extern void SerialMemDump(unsigned char *start, int n);
+
+#if VMM_DEBUG
+void PrintCtrlRegs(struct guest_info *info)
+{
+ struct cr0_32 cr0 = *((struct cr0_32 *) &(info->ctrl_regs.cr0));
+ struct cr2_32 cr2 = *((struct cr2_32 *) &(info->ctrl_regs.cr2));
+ struct cr3_32 cr3 = *((struct cr3_32 *) &(info->ctrl_regs.cr3));
+ struct cr4_32 cr4 = *((struct cr4_32 *) &(info->ctrl_regs.cr4));
+ struct rflags rflags = *((struct rflags *) &(info->ctrl_regs.rflags));
+
+ PrintDebug("CR0: pe 0x%x\n",cr0.pe);
+ PrintDebug("CR0: mp 0x%x\n",cr0.mp);
+ PrintDebug("CR0: em 0x%x\n",cr0.em);
+ PrintDebug("CR0: ts 0x%x\n",cr0.ts);
+ PrintDebug("CR0: et 0x%x\n",cr0.et);
+ PrintDebug("CR0: ne 0x%x\n",cr0.ne);
+ PrintDebug("CR0: rsvd1 0x%x\n",cr0.rsvd1);
+ PrintDebug("CR0: wp 0x%x\n",cr0.wp);
+ PrintDebug("CR0: rsvd2 0x%x\n",cr0.rsvd2);
+ PrintDebug("CR0: am 0x%x\n",cr0.am);
+ PrintDebug("CR0: rsvd3 0x%x\n",cr0.rsvd3);
+ PrintDebug("CR0: nw 0x%x\n",cr0.nw);
+ PrintDebug("CR0: cd 0x%x\n",cr0.cd);
+ PrintDebug("CR0: pg 0x%x\n",cr0.pg);
+
+ PrintDebug("CR2: pfadd 0x%x\n",cr2.pf_vaddr);
+
+ PrintDebug("CR3: rsvd1 0x%x\n",cr3.rsvd1);
+ PrintDebug("CR3: pwt 0x%x\n",cr3.pwt);
+ PrintDebug("CR3: pcd 0x%x\n",cr3.pcd);
+ PrintDebug("CR3: rsvd2 0x%x\n",cr3.rsvd2);
+ PrintDebug("CR3: pdt 0x%x\n",cr3.pdt_base_addr);
+
+ PrintDebug("CR4: vme 0x%x\n",cr4.vme);
+ PrintDebug("CR4: pvi 0x%x\n",cr4.pvi);
+ PrintDebug("CR4: tsd 0x%x\n",cr4.tsd);
+ PrintDebug("CR4: de 0x%x\n",cr4.de);
+ PrintDebug("CR4: pse 0x%x\n",cr4.pse);
+ PrintDebug("CR4: pae 0x%x\n",cr4.pae);
+ PrintDebug("CR4: mce 0x%x\n",cr4.mce);
+ PrintDebug("CR4: pge 0x%x\n",cr4.pge);
+ PrintDebug("CR4: pce 0x%x\n",cr4.pce);
+ PrintDebug("CR4: osfx 0x%x\n",cr4.osf_xsr);
+ PrintDebug("CR4: osx 0x%x\n",cr4.osx);
+ PrintDebug("CR4: rsvd1 0x%x\n",cr4.rsvd1);
+
+ PrintDebug("RFLAGS: cf 0x%x\n",rflags.cf);
+ PrintDebug("RFLAGS: rsvd1 0x%x\n",rflags.rsvd1);
+ PrintDebug("RFLAGS: pf 0x%x\n",rflags.pf);
+ PrintDebug("RFLAGS: rsvd2 0x%x\n",rflags.rsvd2);
+ PrintDebug("RFLAGS: af 0x%x\n",rflags.af);
+ PrintDebug("RFLAGS: rsvd3 0x%x\n",rflags.rsvd3);
+ PrintDebug("RFLAGS: zf 0x%x\n",rflags.zf);
+ PrintDebug("RFLAGS: sf 0x%x\n",rflags.sf);
+ PrintDebug("RFLAGS: tf 0x%x\n",rflags.tf);
+ PrintDebug("RFLAGS: intr 0x%x\n",rflags.intr);
+ PrintDebug("RFLAGS: df 0x%x\n",rflags.df);
+ PrintDebug("RFLAGS: of 0x%x\n",rflags.of);
+ PrintDebug("RFLAGS: iopl 0x%x\n",rflags.iopl);
+ PrintDebug("RFLAGS: nt 0x%x\n",rflags.nt);
+ PrintDebug("RFLAGS: rsvd4 0x%x\n",rflags.rsvd4);
+ PrintDebug("RFLAGS: rf 0x%x\n",rflags.rf);
+ PrintDebug("RFLAGS: vm 0x%x\n",rflags.vm);
+ PrintDebug("RFLAGS: ac 0x%x\n",rflags.ac);
+ PrintDebug("RFLAGS: vif 0x%x\n",rflags.vif);
+ PrintDebug("RFLAGS: id 0x%x\n",rflags.id);
+ PrintDebug("RFLAGS: rsvd5 0x%x\n",rflags.rsvd5);
+ PrintDebug("RFLAGS: rsvd6 0x%x\n",rflags.rsvd6);
+
+}
+#else
+void PrintCtrlRegs(struct guest_info *info)
+{}
+#endif
+
/* Segmentation is a problem here...
*
* When we get a memory operand, presumably we use the default segment (which is?)
new_cr0_val = *(char*)(new_cr0) & 0x0f;
- if (info->page_mode == SHADOW_PAGING) {
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
struct cr0_real * shadow_cr0 = (struct cr0_real*)&(info->shdw_pg_state.guest_cr0);
PrintDebug("Old CR0=%x, Old Shadow CR0=%x\n", *real_cr0, *shadow_cr0);
*(char*)shadow_cr0 &= 0xf0;
*(char*)shadow_cr0 |= new_cr0_val;
+
PrintDebug("New CR0=%x, New Shadow CR0=%x\n", *real_cr0, *shadow_cr0);
} else {
PrintDebug("Old CR0=%x\n", *real_cr0);
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");
return -1;
}
- if (info->page_mode == SHADOW_PAGING) {
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
struct cr0_32 * shadow_cr0 = (struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
PrintDebug("Old CR0=%x, Old Shadow CR0=%x\n", *real_cr0, *shadow_cr0);
*real_cr0 = *new_cr0;
real_cr0->pg = 1;
+ real_cr0->et = 1;
*shadow_cr0 = *new_cr0;
+ shadow_cr0->et = 1;
PrintDebug("New CR0=%x, New Shadow CR0=%x\n", *real_cr0, *shadow_cr0);
} else {
break;
case PROTECTED:
- case PROTECTED_PG:
{
int index = 0;
int ret;
PrintDebug("Protected %s Mode write to CR0 at guest %s linear rip 0x%x\n",
- info->cpu_mode==PROTECTED_PG ? "Paged" : "",
- info->cpu_mode==PROTECTED_PG ? "virtual" : "",
- get_addr_linear(info,info->rip,&(info->segments.cs)));
+ info->mem_mode == VIRTUAL_MEM ? "Paged" : "",
+ info->mem_mode == VIRTUAL_MEM ? "virtual" : "",
+ get_addr_linear(info, info->rip, &(info->segments.cs)));
// OK, now we will read the instruction
// The only difference between PROTECTED and PROTECTED_PG is whether we read
// from guest_pa or guest_va
- if (info->cpu_mode==PROTECTED) {
+ if (info->mem_mode == PHYSICAL_MEM) {
// The real rip address is actually a combination of the rip + CS base
ret = read_guest_pa_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
- } else { //PROTECTED_PG
+ } else {
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
PrintDebug("Could not read instruction (ret=%d)\n", ret);
index += 2;
+ PrintDebug("MovToCR0 instr:\n");
+ PrintTraceMemDump(instr, 15);
+ PrintDebug("EAX=%x\n", *(uint_t*)&(info->vm_regs.rax));
addr_type = decode_operands32(&(info->vm_regs), instr + index, &index, &first_operand, &second_operand, REG32);
new_cr0 = (struct cr0_32 *)first_operand;
+ PrintDebug("first operand=%x\n", *(uint_t *)first_operand);
-
- if (info->page_mode == SHADOW_PAGING) {
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
struct cr0_32 * shadow_cr0 = (struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
if (new_cr0->pg == 1){
struct cr3_32 * shadow_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.shadow_cr3);
- info->cpu_mode = PROTECTED_PG;
+ info->mem_mode = VIRTUAL_MEM;
*shadow_cr0 = *new_cr0;
*real_cr0 = *new_cr0;
+ shadow_cr0->et = 1;
+ real_cr0->et = 1;
//
// Activate Shadow Paging
} else if (new_cr0->pe == 0) {
info->cpu_mode = REAL;
+ info->mem_mode = PHYSICAL_MEM;
+ PrintDebug("Entering Real Mode\n");
+
+ PrintV3CtrlRegs(&(info->ctrl_regs));
+ // reinstate the identity mapped paged tables
+ // But keep the shadow tables around to handle TLB issues.... UGH...
+ //info->shdw_pg_state.shadow_cr3 &= 0x00000fff;
+ //info->shdw_pg_state.shadow_cr3 |= ((addr_t)create_passthrough_pde32_pts(info) & ~0xfff);
+
+ //info->ctrl_regs.cr3 = info->shdw_pg_state.shadow_cr3;
+ info->ctrl_regs.cr3 = ((addr_t)create_passthrough_pde32_pts(info) & ~0xfff);
+
*shadow_cr0 = *new_cr0;
*real_cr0 = *new_cr0;
real_cr0->pg = 1;
+ shadow_cr0->et = 1;
+ real_cr0->et = 1;
+
}
(instr[index + 1] == 0x06)) {
// CLTS instruction
PrintDebug("CLTS instruction - clearing TS flag of real and shadow CR0\n");
- shadow_cr0->ts=0;
- real_cr0->ts=0;
+ shadow_cr0->ts = 0;
+ real_cr0->ts = 0;
index+=2;
PrintDebug("Protected PAE Mode write to CR0 is UNIMPLEMENTED\n");
return -1;
- case PROTECTED_PAE_PG:
- PrintDebug("Protected PAE Paged Mode write to CR0 is UNIMPLEMENTED\n");
- return -1;
-
case LONG:
PrintDebug("Protected Long Mode write to CR0 is UNIMPLEMENTED\n");
return -1;
- case LONG_PG:
- PrintDebug("Protected Long Paged Mode write to CR0 is UNIMPLEMENTED\n");
- return -1;
-
default:
{
PrintDebug("Unknown Mode write to CR0 (info->cpu_mode=0x%x\n)",info->cpu_mode);
return -1;
}
- if (info->page_mode == SHADOW_PAGING) {
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
*virt_cr0 = *(struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
} else {
*virt_cr0 = *real_cr0;
break;
case PROTECTED:
- case PROTECTED_PG:
{
int index = 0;
int ret;
PrintDebug("Protected %s Mode read from CR0 at guest %s linear rip 0x%x\n",
- info->cpu_mode==PROTECTED_PG ? "Paged" : "",
- info->cpu_mode==PROTECTED_PG ? "virtual" : "",
- get_addr_linear(info,info->rip,&(info->segments.cs)));
+ info->mem_mode == VIRTUAL_MEM ? "Paged" : "",
+ info->mem_mode == VIRTUAL_MEM ? "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==PROTECTED) {
+ if (info->cpu_mode == PHYSICAL_MEM) {
// The real rip address is actually a combination of the rip + CS base
ret = read_guest_pa_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
- } else { // PROTECTED_PG
+ } else {
// The real rip address is actually a combination of the rip + CS base
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
PrintDebug("Could not read Protected %s mode instruction (ret=%d)\n",
- info->cpu_mode==PROTECTED_PG ? "Paged" : "", ret);
+ info->cpu_mode == VIRTUAL_MEM ? "Paged" : "", ret);
return -1;
}
virt_cr0 = (struct cr0_32 *)first_operand;
- if (info->page_mode == SHADOW_PAGING) {
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
*virt_cr0 = *(struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
+
+ if (info->mem_mode == PHYSICAL_MEM) {
+ virt_cr0->pg = 0; // clear the pg bit because guest doesn't think it's on
+ }
+
+ PrintDebug("real CR0: %x\n", *(uint_t*)real_cr0);
+ PrintDebug("returned CR0: %x\n", *(uint_t*)virt_cr0);
+
+
} else {
*virt_cr0 = *real_cr0;
}
PrintDebug("Protected PAE Mode read to CR0 is UNIMPLEMENTED\n");
return -1;
- case PROTECTED_PAE_PG:
- PrintDebug("Protected PAE Paged Mode read to CR0 is UNIMPLEMENTED\n");
- return -1;
-
case LONG:
PrintDebug("Protected Long Mode read to CR0 is UNIMPLEMENTED\n");
return -1;
- case LONG_PG:
- PrintDebug("Protected Long Paged Mode read to CR0 is UNIMPLEMENTED\n");
- return -1;
+
default:
{
PrintDebug("Unknown Mode read from CR0 (info->cpu_mode=0x%x)\n",info->cpu_mode);
int handle_cr3_write(struct guest_info * info) {
- if ((info->cpu_mode == PROTECTED) || (info->cpu_mode == PROTECTED_PG)) {
+ if (info->cpu_mode == PROTECTED) {
int index = 0;
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->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);
+ } else {
+ PrintDebug("Writing Guest CR3 Write (Virtual Address)\n");
+ // The real rip address is actually a combination of the rip + CS base
+ ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+ }
- /* Isn't the RIP a Guest Virtual Address???????? */
- ret = read_guest_pa_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;
new_cr3 = (struct cr3_32 *)first_operand;
- if (info->page_mode == SHADOW_PAGING) {
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
addr_t shadow_pt;
struct cr3_32 * shadow_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.shadow_cr3);
struct cr3_32 * guest_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.guest_cr3);
- PrintDebug("fooo1\n");
+
+ if (CR3_TO_PDE32(*(uint_t*)shadow_cr3) != 0) {
+ PrintDebug("Shadow Page Table\n");
+ PrintDebugPageTables((pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3));
+ }
/* Delete the current Page Tables */
delete_page_tables_pde32((pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3));
- PrintDebug("fooo2\n");
+ PrintDebug("Old Shadow CR3=%x; Old Guest CR3=%x\n",
+ *(uint_t*)shadow_cr3, *(uint_t*)guest_cr3);
+
+
*guest_cr3 = *new_cr3;
+
+
// Something like this
shadow_pt = create_new_shadow_pt32(info);
//shadow_pt = setup_shadow_pt32(info, CR3_TO_PDE32(*(addr_t *)new_cr3));
-
/* Copy Various flags */
*shadow_cr3 = *new_cr3;
+
+ {
+ addr_t tmp_addr;
+ guest_pa_to_host_va(info, ((*(uint_t*)guest_cr3) & 0xfffff000), &tmp_addr);
+ PrintDebug("Guest PD\n");
+ PrintPD32((pde32_t *)tmp_addr);
+
+ }
+
+
shadow_cr3->pdt_base_addr = PD32_BASE_ADDR(shadow_pt);
- if (info->cpu_mode == PROTECTED_PG) {
+ PrintDebug("New Shadow CR3=%x; New Guest CR3=%x\n",
+ *(uint_t*)shadow_cr3, *(uint_t*)guest_cr3);
+
+
+
+ if (info->mem_mode == VIRTUAL_MEM) {
// If we aren't in paged mode then we have to preserve the identity mapped CR3
info->ctrl_regs.cr3 = *(addr_t*)shadow_cr3;
}
} 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;
}
int handle_cr3_read(struct guest_info * info) {
- if ((info->cpu_mode == PROTECTED) || (info->cpu_mode == PROTECTED_PG)) {
+
+ if (info->cpu_mode == REAL) {
+ // what does this mean???
+
+ /*
+
+ addr_t host_addr;
+ addr_t linear_addr = 0;
+
+
+
+ linear_addr = get_addr_linear(info, info->rip, &(info->segments.cs));
+
+
+ PrintDebug("RIP Linear: %x\n", linear_addr);
+ PrintV3Segments(&(info->segments));
+
+
+ if (info->mem_mode == PHYSICAL_MEM) {
+ guest_pa_to_host_pa(info, linear_addr, &host_addr);
+ } else if (info->mem_mode == VIRTUAL_MEM) {
+ guest_va_to_host_pa(info, linear_addr, &host_addr);
+ }
+
+
+ pt32_lookup((pde32_t *)CR3_TO_PDE32(info->shdw_pg_state.shadow_cr3), , addr_t * paddr);
+ */
+
+
+ return -1;
+ } else if (info->cpu_mode == PROTECTED) {
+
int index = 0;
int ret;
char instr[15];
- ret = read_guest_pa_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+
+ // 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) {
+ // The real rip address is actually a combination of the rip + CS base
+ ret = read_guest_pa_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+ } else {
+ // The real rip address is actually a combination of the rip + CS base
+ 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;
virt_cr3 = (struct cr3_32 *)first_operand;
- if (info->page_mode == SHADOW_PAGING) {
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
*virt_cr3 = *(struct cr3_32 *)&(info->shdw_pg_state.guest_cr3);
} else {
*virt_cr3 = *real_cr3;
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), control registers follow\n", info->cpu_mode);
+ PrintCtrlRegs(info);
return -1;
}
