+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
#include <palacios/vmm_mem.h>
#include <palacios/vmm.h>
#include <palacios/vmcb.h>
#endif
+static int handle_lmsw(struct guest_info * info, struct x86_instr * dec_instr);
+static int handle_clts(struct guest_info * info, struct x86_instr * dec_instr);
+
+static int handle_mov_to_cr0(struct guest_info * info, struct x86_instr * dec_instr);
+static int handle_mov_to_cr0_32(struct guest_info * info, struct x86_instr * dec_instr);
+static int handle_mov_to_cr0_32pae(struct guest_info * info, struct x86_instr * dec_instr);
+static int handle_mov_to_cr0_64(struct guest_info * info, struct x86_instr * dec_instr);
+static int handle_mov_to_cr0_64compat(struct guest_info * info, struct x86_instr * dec_instr);
+
+static int handle_mov_to_cr3_32(struct guest_info * info, struct x86_instr * dec_instr);
+static int handle_mov_to_cr3_32pae(struct guest_info * info, struct x86_instr * dec_instr);
+static int handle_mov_to_cr3_64(struct guest_info * info, struct x86_instr * dec_instr);
+static int handle_mov_to_cr3_64compat(struct guest_info * info, struct x86_instr * dec_instr);
// First Attempt = 494 lines
// current = 106 lines
-int handle_cr0_write(struct guest_info * info) {
- char instr[15];
+int v3_handle_cr0_write(struct guest_info * info) {
+ uchar_t instr[15];
int ret;
struct x86_instr dec_instr;
return -1;
}
+ if (v3_opcode_cmp(V3_OPCODE_LMSW, (const uchar_t *)(dec_instr.opcode)) == 0) {
- if (opcode_cmp(V3_OPCODE_LMSW, (const uchar_t *)(dec_instr.opcode)) == 0) {
- struct cr0_real *real_cr0 = (struct cr0_real*)&(info->ctrl_regs.cr0);
- struct cr0_real *new_cr0 = (struct cr0_real *)(dec_instr.src_operand.operand);
- uchar_t new_cr0_val;
-
- PrintDebug("LMSW\n");
-
- new_cr0_val = (*(char*)(new_cr0)) & 0x0f;
-
- PrintDebug("OperandVal = %x\n", new_cr0_val);
-
- PrintDebug("Old CR0=%x\n", *real_cr0);
- *(uchar_t*)real_cr0 &= 0xf0;
- *(uchar_t*)real_cr0 |= new_cr0_val;
- PrintDebug("New CR0=%x\n", *real_cr0);
-
-
- if (info->shdw_pg_mode == SHADOW_PAGING) {
- struct cr0_real * shadow_cr0 = (struct cr0_real*)&(info->shdw_pg_state.guest_cr0);
-
- PrintDebug(" Old Shadow CR0=%x\n", *shadow_cr0);
- *(uchar_t*)shadow_cr0 &= 0xf0;
- *(uchar_t*)shadow_cr0 |= new_cr0_val;
- PrintDebug("New Shadow CR0=%x\n", *shadow_cr0);
+ if (handle_lmsw(info, &dec_instr) == -1) {
+ return -1;
}
- } else if (opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) == 0) {
- PrintDebug("MOV2CR0\n");
- if (info->cpu_mode == LONG) {
- // 64 bit registers
- } else {
- // 32 bit registers
- 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.src_operand.size);
-
-
- PrintDebug("Old CR0=%x\n", *real_cr0);
- *real_cr0 = *new_cr0;
-
-
- if (info->shdw_pg_mode == SHADOW_PAGING) {
- struct cr0_32 * shadow_cr0 = (struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
-
- PrintDebug("Old Shadow CR0=%x\n", *shadow_cr0);
-
- real_cr0->et = 1;
-
- *shadow_cr0 = *new_cr0;
- shadow_cr0->et = 1;
-
- if (get_mem_mode(info) == VIRTUAL_MEM) {
- struct cr3_32 * shadow_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.shadow_cr3);
-
- info->ctrl_regs.cr3 = *(addr_t*)shadow_cr3;
- } else {
- info->ctrl_regs.cr3 = *(addr_t*)&(info->direct_map_pt);
- real_cr0->pg = 1;
- }
-
- PrintDebug("New Shadow CR0=%x\n",*shadow_cr0);
- }
- PrintDebug("New CR0=%x\n", *real_cr0);
+ } else if (v3_opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) == 0) {
+
+ if (handle_mov_to_cr0(info, &dec_instr) == -1) {
+ return -1;
}
- } else if (opcode_cmp(V3_OPCODE_CLTS, (const uchar_t *)(dec_instr.opcode)) == 0) {
- // CLTS
- struct cr0_32 *real_cr0 = (struct cr0_32*)&(info->ctrl_regs.cr0);
-
- real_cr0->ts = 0;
+ } else if (v3_opcode_cmp(V3_OPCODE_CLTS, (const uchar_t *)(dec_instr.opcode)) == 0) {
- if (info->shdw_pg_mode == SHADOW_PAGING) {
- struct cr0_32 * shadow_cr0 = (struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
- shadow_cr0->ts = 0;
+ if (handle_clts(info, &dec_instr) == -1) {
+ return -1;
}
+
} else {
PrintError("Unhandled opcode in handle_cr0_write\n");
return -1;
}
+
+
+static int handle_mov_to_cr0(struct guest_info * info, struct x86_instr * dec_instr) {
+ PrintDebug("MOV2CR0\n");
+
+ switch (info->cpu_mode) {
+ case REAL:
+ case PROTECTED:
+ return handle_mov_to_cr0_32(info, dec_instr);
+ case PROTECTED_PAE:
+ return handle_mov_to_cr0_32pae(info, dec_instr);
+ case LONG:
+ return handle_mov_to_cr0_64(info, dec_instr);
+ case LONG_32_COMPAT:
+ return handle_mov_to_cr0_64compat(info, dec_instr);
+ default:
+ PrintError("Invalid CPU Operating Mode: %d\n", info->cpu_mode);
+ return -1;
+
+ }
+}
+
+static int handle_mov_to_cr0_32pae(struct guest_info * info, struct x86_instr * dec_instr) {
+ PrintError("32 bit PAE mov to CR0 not implemented\n");
+ return -1;
+}
+
+static int handle_mov_to_cr0_64(struct guest_info * info, struct x86_instr * dec_instr) {
+ PrintError("64 bit mov to CR0 not implemented\n");
+ return -1;
+}
+
+static int handle_mov_to_cr0_64compat(struct guest_info * info, struct x86_instr * dec_instr) {
+ PrintError("64 bit compatibility mode move to CR0 not implemented\n");
+ return -1;
+}
+
+
+static int handle_mov_to_cr0_32(struct guest_info * info, struct x86_instr * dec_instr) {
+
+ // 32 bit registers
+ 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", *(uint_t *)new_cr0, dec_instr->src_operand.size);
+
+
+ PrintDebug("Old CR0=%x\n", *(uint_t *)real_cr0);
+ *real_cr0 = *new_cr0;
+
+
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ struct cr0_32 * shadow_cr0 = (struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
+
+ PrintDebug("Old Shadow CR0=%x\n", *(uint_t *)shadow_cr0);
+
+ real_cr0->et = 1;
+
+ *shadow_cr0 = *new_cr0;
+ shadow_cr0->et = 1;
+
+ if (v3_get_mem_mode(info) == VIRTUAL_MEM) {
+ struct cr3_32 * shadow_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.shadow_cr3);
+ PrintDebug("Setting up Shadow Page Table\n");
+ info->ctrl_regs.cr3 = *(addr_t*)shadow_cr3;
+ } else {
+ info->ctrl_regs.cr3 = *(addr_t*)&(info->direct_map_pt);
+ real_cr0->pg = 1;
+ }
+
+ PrintDebug("New Shadow CR0=%x\n",*(uint_t *)shadow_cr0);
+ }
+ PrintDebug("New CR0=%x\n", *(uint_t *)real_cr0);
+
+ return 0;
+}
+
+
+
+
+static int handle_clts(struct guest_info * info, struct x86_instr * dec_instr) {
+ // CLTS
+ struct cr0_32 *real_cr0 = (struct cr0_32*)&(info->ctrl_regs.cr0);
+
+ real_cr0->ts = 0;
+
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ struct cr0_32 * shadow_cr0 = (struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
+ shadow_cr0->ts = 0;
+ }
+ return 0;
+}
+
+
+static int handle_lmsw(struct guest_info * info, struct x86_instr * dec_instr) {
+ struct cr0_real *real_cr0 = (struct cr0_real*)&(info->ctrl_regs.cr0);
+ struct cr0_real *new_cr0 = (struct cr0_real *)(dec_instr->src_operand.operand);
+ uchar_t new_cr0_val;
+
+ PrintDebug("LMSW\n");
+
+ new_cr0_val = (*(char*)(new_cr0)) & 0x0f;
+
+ PrintDebug("OperandVal = %x\n", new_cr0_val);
+
+ PrintDebug("Old CR0=%x\n", *(uint_t *)real_cr0);
+ *(uchar_t*)real_cr0 &= 0xf0;
+ *(uchar_t*)real_cr0 |= new_cr0_val;
+ PrintDebug("New CR0=%x\n", *(uint_t *)real_cr0);
+
+
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ struct cr0_real * shadow_cr0 = (struct cr0_real*)&(info->shdw_pg_state.guest_cr0);
+
+ PrintDebug(" Old Shadow CR0=%x\n", *(uint_t *)shadow_cr0);
+ *(uchar_t*)shadow_cr0 &= 0xf0;
+ *(uchar_t*)shadow_cr0 |= new_cr0_val;
+ PrintDebug("New Shadow CR0=%x\n", *(uint_t *)shadow_cr0);
+ }
+ return 0;
+}
+
+
+
+
+
+
+
+
+
+
// First attempt = 253 lines
// current = 51 lines
-int handle_cr0_read(struct guest_info * info) {
- char instr[15];
+int v3_handle_cr0_read(struct guest_info * info) {
+ uchar_t instr[15];
int ret;
struct x86_instr dec_instr;
return -1;
}
- if (opcode_cmp(V3_OPCODE_MOVCR2, (const uchar_t *)(dec_instr.opcode)) == 0) {
+ if (v3_opcode_cmp(V3_OPCODE_MOVCR2, (const uchar_t *)(dec_instr.opcode)) == 0) {
struct cr0_32 * virt_cr0 = (struct cr0_32 *)(dec_instr.dst_operand.operand);
struct cr0_32 * real_cr0 = (struct cr0_32 *)&(info->ctrl_regs.cr0);
PrintDebug("MOVCR2\n");
- PrintDebug("CR0 at 0x%x\n", real_cr0);
+ PrintDebug("CR0 at 0x%p\n", (void *)real_cr0);
if (info->shdw_pg_mode == SHADOW_PAGING) {
*virt_cr0 = *(struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
PrintDebug("real CR0: %x\n", *(uint_t*)real_cr0);
PrintDebug("returned CR0: %x\n", *(uint_t*)virt_cr0);
- } else if (opcode_cmp(V3_OPCODE_SMSW, (const uchar_t *)(dec_instr.opcode)) == 0) {
+ } else if (v3_opcode_cmp(V3_OPCODE_SMSW, (const uchar_t *)(dec_instr.opcode)) == 0) {
struct cr0_real *real_cr0= (struct cr0_real*)&(info->ctrl_regs.cr0);
struct cr0_real *virt_cr0 = (struct cr0_real *)(dec_instr.dst_operand.operand);
char cr0_val = *(char*)real_cr0 & 0x0f;
PrintDebug("SMSW\n");
- PrintDebug("CR0 at 0x%x\n", real_cr0);
+ PrintDebug("CR0 at 0x%p\n", real_cr0);
*(char *)virt_cr0 &= 0xf0;
*(char *)virt_cr0 |= cr0_val;
-// First Attemp = 256 lines
+
+// First Attempt = 256 lines
// current = 65 lines
-int handle_cr3_write(struct guest_info * info) {
+int v3_handle_cr3_write(struct guest_info * info) {
int ret;
- char instr[15];
+ uchar_t instr[15];
struct x86_instr dec_instr;
if (info->mem_mode == PHYSICAL_MEM) {
ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
}
- /* 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");
return -1;
}
- if (opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) == 0) {
-
+ if (v3_opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) == 0) {
PrintDebug("MOV2CR3\n");
- PrintDebug("CR3 at 0x%x\n", &(info->ctrl_regs.cr3));
+ if (info->mem_mode == PHYSICAL_MEM) {
+ // All we do is update the guest CR3
- if (info->shdw_pg_mode == SHADOW_PAGING) {
- struct cr3_32 * new_cr3 = (struct cr3_32 *)(dec_instr.src_operand.operand);
- struct cr3_32 * guest_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.guest_cr3);
- struct cr3_32 * shadow_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.shadow_cr3);
- int cached = 0;
-
+ if (info->cpu_mode == LONG) {
+ struct cr3_64 * new_cr3 = (struct cr3_64 *)(dec_instr.src_operand.operand);
+ struct cr3_64 * guest_cr3 = (struct cr3_64 *)&(info->shdw_pg_state.guest_cr3);
+ *guest_cr3 = *new_cr3;
+ } else {
+ struct cr3_32 * new_cr3 = (struct cr3_32 *)(dec_instr.src_operand.operand);
+ struct cr3_32 * guest_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.guest_cr3);
+ *guest_cr3 = *new_cr3;
+ }
- PrintDebug("Old Shadow CR3=%x; Old Guest CR3=%x\n",
- *(uint_t*)shadow_cr3, *(uint_t*)guest_cr3);
-
+ } else {
- cached = cache_page_tables32(info, CR3_TO_PDE32(*(addr_t *)new_cr3));
- if (cached == -1) {
- PrintError("CR3 Cache failed\n");
+ switch (info->cpu_mode) {
+ case PROTECTED:
+ if (handle_mov_to_cr3_32(info, &dec_instr) == -1) {
+ return -1;
+ }
+ case PROTECTED_PAE:
+ if (handle_mov_to_cr3_32pae(info, &dec_instr) == -1) {
+ return -1;
+ }
+ case LONG:
+ if (handle_mov_to_cr3_64(info, &dec_instr) == -1) {
+ return -1;
+ }
+ case LONG_32_COMPAT:
+ if (handle_mov_to_cr3_64compat(info, &dec_instr) == -1) {
+ return -1;
+ }
+ default:
+ PrintError("Unhandled CPU mode: %d\n", info->cpu_mode);
return -1;
- } else if (cached == 0) {
+ }
+ }
+ } else {
+ PrintError("Unhandled opcode in handle_cr3_write\n");
+ return -1;
+ }
+ info->rip += dec_instr.instr_length;
- addr_t shadow_pt;
+ return 0;
+}
-
- PrintDebug("New CR3 is different - flushing shadow page table\n");
-
- delete_page_tables_pde32((pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3));
-
- shadow_pt = create_new_shadow_pt32();
-
- shadow_cr3->pdt_base_addr = PD32_BASE_ADDR(shadow_pt);
- } else {
- PrintDebug("Reusing cached shadow Page table\n");
+
+
+
+
+
+
+static int handle_mov_to_cr3_32(struct guest_info * info, struct x86_instr * dec_instr) {
+ PrintDebug("CR3 at 0x%p\n", &(info->ctrl_regs.cr3));
+
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ struct cr3_32 * new_cr3 = (struct cr3_32 *)(dec_instr->src_operand.operand);
+ struct cr3_32 * guest_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.guest_cr3);
+ struct cr3_32 * shadow_cr3 = (struct cr3_32 *)&(info->shdw_pg_state.shadow_cr3);
+ int cached = 0;
+
+
+ PrintDebug("Old Shadow CR3=%x; Old Guest CR3=%x\n",
+ *(uint_t*)shadow_cr3, *(uint_t*)guest_cr3);
+
+
+
+ cached = v3_cache_page_tables32(info, (addr_t)V3_PAddr((void *)(addr_t)CR3_TO_PDE32((void *)*(addr_t *)new_cr3)));
+
+ if (cached == -1) {
+ PrintError("CR3 Cache failed\n");
+ return -1;
+ } else if (cached == 0) {
+ addr_t shadow_pt;
+
+ if(info->mem_mode == VIRTUAL_MEM) {
+ PrintDebug("New CR3 is different - flushing shadow page table %p\n", shadow_cr3 );
+ delete_page_tables_32((pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3));
}
- shadow_cr3->pwt = new_cr3->pwt;
- shadow_cr3->pcd = new_cr3->pcd;
+ shadow_pt = v3_create_new_shadow_pt();
- // What the hell...
- *guest_cr3 = *new_cr3;
+ shadow_cr3->pdt_base_addr = (addr_t)V3_PAddr((void *)(addr_t)PD32_BASE_ADDR(shadow_pt));
+ PrintDebug( "Created new shadow page table %p\n", (void *)(addr_t)shadow_cr3->pdt_base_addr );
+ //PrintDebugPageTables( (pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3) );
- 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("Reusing cached shadow Page table\n");
+ }
+
+
+ shadow_cr3->pwt = new_cr3->pwt;
+ shadow_cr3->pcd = new_cr3->pcd;
+
+ // What the hell...
+ *guest_cr3 = *new_cr3;
+
+ 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 {
- PrintError("Unhandled opcode in handle_cr3_write\n");
- return -1;
}
+ return 0;
+}
- info->rip += dec_instr.instr_length;
- return 0;
+static int handle_mov_to_cr3_32pae(struct guest_info * info, struct x86_instr * dec_instr) {
+ PrintError("32 Bit PAE mode Mov to CR3 not implemented\n");
+ return -1;
+}
+
+static int handle_mov_to_cr3_64(struct guest_info * info, struct x86_instr * dec_instr) {
+ PrintError("Long mode Mov to CR3 not implemented\n");
+ return -1;
+}
+
+static int handle_mov_to_cr3_64compat(struct guest_info * info, struct x86_instr * dec_instr) {
+ PrintError("Long compatiblity mode move to CR3 not implemented\n");
+ return -1;
}
// first attempt = 156 lines
// current = 36 lines
-int handle_cr3_read(struct guest_info * info) {
- char instr[15];
+int v3_handle_cr3_read(struct guest_info * info) {
+ uchar_t instr[15];
int ret;
struct x86_instr dec_instr;
return -1;
}
- if (opcode_cmp(V3_OPCODE_MOVCR2, (const uchar_t *)(dec_instr.opcode)) == 0) {
+ if (v3_opcode_cmp(V3_OPCODE_MOVCR2, (const uchar_t *)(dec_instr.opcode)) == 0) {
PrintDebug("MOVCR32\n");
struct cr3_32 * virt_cr3 = (struct cr3_32 *)(dec_instr.dst_operand.operand);
- PrintDebug("CR3 at 0x%x\n", &(info->ctrl_regs.cr3));
+ PrintDebug("CR3 at 0x%p\n", &(info->ctrl_regs.cr3));
if (info->shdw_pg_mode == SHADOW_PAGING) {
*virt_cr3 = *(struct cr3_32 *)&(info->shdw_pg_state.guest_cr3);
return -1;
}
+ info->rip += dec_instr.instr_length;
+
+ return 0;
+}
+
+int v3_handle_cr4_read(struct guest_info * info) {
+ PrintError("CR4 Read not handled\n");
+ return -1;
+}
+
+int v3_handle_cr4_write(struct guest_info * info) {
+ uchar_t instr[15];
+ int ret;
+ struct x86_instr dec_instr;
+
+ if (info->mem_mode == PHYSICAL_MEM) {
+ ret = read_guest_pa_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+ } else {
+ ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
+ }
+
+ if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) {
+ PrintError("Could not decode instruction\n");
+ return -1;
+ }
+
+ if (v3_opcode_cmp(V3_OPCODE_MOV2CR, (const uchar_t *)(dec_instr.opcode)) != 0) {
+ PrintError("Invalid opcode in write to CR4\n");
+ return -1;
+ }
+
+ if ((info->cpu_mode == PROTECTED) || (info->cpu_mode == PROTECTED_PAE)) {
+ struct cr4_32 * new_cr4 = (struct cr4_32 *)(dec_instr.src_operand.operand);
+ struct cr4_32 * old_cr4 = (struct cr4_32 *)&(info->ctrl_regs.cr4);
+
+ PrintDebug("OperandVal = %x, length = %d\n", *(uint_t *)new_cr4, dec_instr.src_operand.size);
+ PrintDebug("Old CR4=%x\n", *(uint_t *)old_cr4);
+
+
+
+
+ if ((info->shdw_pg_mode == SHADOW_PAGING) &&
+ (v3_get_mem_mode(info) == PHYSICAL_MEM)) {
+
+ if ((old_cr4->pae == 0) && (new_cr4->pae == 1)) {
+ PrintDebug("Creating PAE passthrough tables\n");
+
+ // Delete the old 32 bit direct map page tables
+ delete_page_tables_32((pde32_t *)V3_VAddr((void *)(info->direct_map_pt)));
+
+ // create 32 bit PAE direct map page table
+ info->direct_map_pt = (addr_t)V3_PAddr(create_passthrough_pts_32PAE(info));
+
+ // reset cr3 to new page tables
+ info->ctrl_regs.cr3 = *(addr_t*)&(info->direct_map_pt);
+
+ } else if ((old_cr4->pae == 1) && (new_cr4->pae == 0)) {
+ // Create passthrough standard 32bit pagetables
+ return -1;
+ }
+ }
+
+ *old_cr4 = *new_cr4;
+ PrintDebug("New CR4=%x\n", *(uint_t *)old_cr4);
+
+ } else {
+ return -1;
+ }
info->rip += dec_instr.instr_length;
+ return 0;
+}
+
+
+int v3_handle_efer_read(uint_t msr, struct v3_msr * dst, void * priv_data) {
+ struct guest_info * info = (struct guest_info *)(priv_data);
+ PrintDebug("EFER Read\n");
+
+ dst->value = info->guest_efer.value;
+ info->rip += 2; // WRMSR/RDMSR are two byte operands
return 0;
}
+int v3_handle_efer_write(uint_t msr, struct v3_msr src, void * priv_data) {
+ struct guest_info * info = (struct guest_info *)(priv_data);
+ struct efer_64 * new_efer = (struct efer_64 *)&(src.value);
+ struct efer_64 * old_efer = (struct efer_64 *)&(info->ctrl_regs.efer);
+ PrintDebug("EFER Write\n");
+ PrintDebug("Old EFER=%p\n", (void *)*(addr_t*)(old_efer));
+ // We virtualize the guests efer to hide the SVME and LMA bits
+ info->guest_efer.value = src.value;
+
+ if ((info->shdw_pg_mode == SHADOW_PAGING) &&
+ (v3_get_mem_mode(info) == PHYSICAL_MEM)) {
+
+ if ((old_efer->lme == 0) && (new_efer->lme == 1)) {
+ PrintDebug("Transition to longmode\n");
+ PrintDebug("Creating Passthrough 64 bit page tables\n");
+
+ // Delete the old 32 bit direct map page tables
+ /*
+ * JRL BUG?
+ * Will these page tables always be in PAE format??
+ */
+ PrintDebug("Deleting old PAE Page tables\n");
+ PrintError("JRL BUG?: Will the old page tables always be in PAE format??\n");
+ delete_page_tables_32PAE((pdpe32pae_t *)V3_VAddr((void *)(info->direct_map_pt)));
+
+ // create 64 bit direct map page table
+ info->direct_map_pt = (addr_t)V3_PAddr(create_passthrough_pts_64(info));
+
+ // reset cr3 to new page tables
+ info->ctrl_regs.cr3 = *(addr_t*)&(info->direct_map_pt);
+
+
+ // Does this mean we will have to fully virtualize a shadow EFER?? (yes it does)
+ new_efer->lma = 1;
+
+ } else if ((old_efer->lme == 1) && (new_efer->lme == 0)) {
+ // transition out of long mode
+ //((struct efer_64 *)&(info->guest_efer.value))->lme = 0;
+ //((struct efer_64 *)&(info->guest_efer.value))->lma = 0;
+
+ return -1;
+ }
+
+ *old_efer = *new_efer;
+ PrintDebug("New EFER=%p\n", (void *)*(addr_t *)(old_efer));
+ } else {
+ return -1;
+ }
+
+ info->rip += 2; // WRMSR/RDMSR are two byte operands
+
+ return 0;
+}
