void init_shadow_region(struct shadow_region * entry,
addr_t guest_addr_start,
addr_t guest_addr_end,
- guest_region_type_t guest_region_type,
- host_region_type_t host_region_type)
+ shdw_region_type_t shdw_region_type)
{
- entry->guest_type = guest_region_type;
entry->guest_start = guest_addr_start;
entry->guest_end = guest_addr_end;
- entry->host_type = host_region_type;
+ entry->host_type = shdw_region_type;
entry->host_addr = 0;
- entry->next=entry->prev = NULL;
+ entry->next = entry->prev = NULL;
}
int add_shadow_region_passthrough( struct guest_info * guest_info,
struct shadow_region * entry = (struct shadow_region *)V3_Malloc(sizeof(struct shadow_region));
init_shadow_region(entry, guest_addr_start, guest_addr_end,
- GUEST_REGION_PHYSICAL_MEMORY, HOST_REGION_PHYSICAL_MEMORY);
+ SHDW_REGION_ALLOCATED);
entry->host_addr = host_addr;
return add_shadow_region(&(guest_info->mem_map), entry);
}
-int hook_guest_mem(struct guest_info * info, addr_t guest_addr_start, addr_t guest_addr_end,
- int (*read)(addr_t guest_addr, void * dst, uint_t length, void * priv_data),
- int (*write)(addr_t guest_addr, void * src, uint_t length, void * priv_data),
- void * priv_data) {
-
- struct shadow_region * entry = (struct shadow_region *)V3_Malloc(sizeof(struct shadow_region));
- struct vmm_mem_hook * hook = (struct vmm_mem_hook *)V3_Malloc(sizeof(struct vmm_mem_hook));
-
- memset(hook, 0, sizeof(struct vmm_mem_hook));
-
- hook->read = read;
- hook->write = write;
- hook->region = entry;
- hook->priv_data = priv_data;
+int v3_hook_write_mem(struct guest_info * info, addr_t guest_addr_start, addr_t guest_addr_end,
+ addr_t host_addr,
+ int (*write)(addr_t guest_addr, void * src, uint_t length, void * priv_data),
+ void * priv_data) {
+ struct shadow_region * entry = (struct shadow_region *)V3_Malloc(sizeof(struct shadow_region));
init_shadow_region(entry, guest_addr_start, guest_addr_end,
- GUEST_REGION_PHYSICAL_MEMORY, HOST_REGION_HOOK);
+ SHDW_REGION_WRITE_HOOK);
- entry->host_addr = (addr_t)hook;
+ entry->write_hook = write;
+ entry->read_hook = NULL;
+ entry->host_addr = host_addr;
+ entry->priv_data = priv_data;
- return add_shadow_region(&(info->mem_map), entry);
+ return add_shadow_region(&(info->mem_map), entry);
}
+int v3_hook_full_mem(struct guest_info * info, addr_t guest_addr_start, addr_t guest_addr_end,
+ int (*read)(addr_t guest_addr, void * dst, uint_t length, void * priv_data),
+ int (*write)(addr_t guest_addr, void * src, uint_t length, void * priv_data),
+ void * priv_data) {
+
+ struct shadow_region * entry = (struct shadow_region *)V3_Malloc(sizeof(struct shadow_region));
-struct vmm_mem_hook * get_mem_hook(struct guest_info * info, addr_t guest_addr) {
- struct shadow_region * region = get_shadow_region_by_addr(&(info->mem_map), guest_addr);
-
- if (region == NULL) {
- PrintDebug("Could not find shadow region for addr: %p\n", (void *)guest_addr);
- return NULL;
- }
-
- return (struct vmm_mem_hook *)(region->host_addr);
-}
-
+ init_shadow_region(entry, guest_addr_start, guest_addr_end,
+ SHDW_REGION_FULL_HOOK);
-/* mem_addr is the guest physical memory address */
-static int mem_hook_dispatch(struct guest_info * info,
- addr_t fault_gva, addr_t fault_gpa,
- pf_error_t access_info, struct vmm_mem_hook * hook)
-{
+ entry->write_hook = write;
+ entry->read_hook = read;
+ entry->priv_data = priv_data;
- // emulate and then dispatch
- // or dispatch and emulate
+ entry->host_addr = 0;
+ return add_shadow_region(&(info->mem_map), entry);
+}
- if (access_info.write == 1) {
- if (v3_emulate_memory_write(info, fault_gva, hook->write, fault_gpa, hook->priv_data) == -1) {
- PrintError("Memory write emulation failed\n");
- return -1;
- }
-
- } else {
- if (v3_emulate_memory_read(info, fault_gva, hook->read, fault_gpa, hook->priv_data) == -1) {
- PrintError("Memory read emulation failed\n");
- return -1;
- }
- }
- return 0;
-}
int handle_special_page_fault(struct guest_info * info,
addr_t fault_gva, addr_t fault_gpa,
pf_error_t access_info)
{
- struct shadow_region * reg = get_shadow_region_by_addr(&(info->mem_map), fault_gpa);
+ struct shadow_region * reg = get_shadow_region_by_addr(&(info->mem_map), fault_gpa);
PrintDebug("Handling Special Page Fault\n");
switch (reg->host_type) {
- case HOST_REGION_HOOK:
- return mem_hook_dispatch(info, fault_gva, fault_gpa, access_info, (struct vmm_mem_hook *)(reg->host_addr));
+ case SHDW_REGION_WRITE_HOOK:
+ return v3_handle_mem_wr_hook(info, fault_gva, fault_gpa, reg, access_info);
+ case SHDW_REGION_FULL_HOOK:
+ return v3_handle_mem_full_hook(info, fault_gva, fault_gpa, reg, access_info);
default:
return -1;
}
}
+int v3_handle_mem_wr_hook(struct guest_info * info, addr_t guest_va, addr_t guest_pa,
+ struct shadow_region * reg, pf_error_t access_info) {
+
+ addr_t write_src_addr = 0;
+
+ int write_len = v3_emulate_write_op(info, guest_va, guest_pa, &write_src_addr);
+
+ if (write_len == -1) {
+ PrintError("Emulation failure in write hook\n");
+ return -1;
+ }
+
+
+ if (reg->write_hook(guest_pa, (void *)write_src_addr, write_len, reg->priv_data) != write_len) {
+ PrintError("Memory write hook did not return correct value\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int v3_handle_mem_full_hook(struct guest_info * info, addr_t guest_va, addr_t guest_pa,
+ struct shadow_region * reg, pf_error_t access_info) {
+ return -1;
+}
+
+
+
+struct shadow_region * v3_get_shadow_region(struct guest_info * info, addr_t addr) {
+ struct shadow_region * reg = info->mem_map.head;
+
+ while (reg) {
+ if ((reg->guest_start <= addr) && (reg->guest_end > addr)) {
+ return reg;
+ } else if (reg->guest_start > addr) {
+ return NULL;
+ } else {
+ reg = reg->next;
+ }
+ }
+ return NULL;
+}
void init_shadow_map(struct guest_info * info) {
}
-host_region_type_t get_shadow_addr_type(struct guest_info * info, addr_t guest_addr) {
+shdw_region_type_t get_shadow_addr_type(struct guest_info * info, addr_t guest_addr) {
struct shadow_region * reg = get_shadow_region_by_addr(&(info->mem_map), guest_addr);
if (!reg) {
- return HOST_REGION_INVALID;
+ return SHDW_REGION_INVALID;
} else {
return reg->host_type;
}
}
-host_region_type_t lookup_shadow_map_addr(struct shadow_map * map, addr_t guest_addr, addr_t * host_addr) {
+shdw_region_type_t lookup_shadow_map_addr(struct shadow_map * map, addr_t guest_addr, addr_t * host_addr) {
struct shadow_region * reg = get_shadow_region_by_addr(map, guest_addr);
if (!reg) {
// No mapping exists
- return HOST_REGION_INVALID;
+ return SHDW_REGION_INVALID;
} else {
switch (reg->host_type) {
- case HOST_REGION_PHYSICAL_MEMORY:
+ case SHDW_REGION_ALLOCATED:
+ case SHDW_REGION_WRITE_HOOK:
*host_addr = (guest_addr - reg->guest_start) + reg->host_addr;
return reg->host_type;
- case HOST_REGION_MEMORY_MAPPED_DEVICE:
- case HOST_REGION_UNALLOCATED:
+ case SHDW_REGION_UNALLOCATED:
+ case SHDW_REGION_FULL_HOOK:
// ...
default:
*host_addr = 0;
PrintDebug("Memory Layout (regions: %d) \n", map->num_regions);
while (cur) {
- PrintDebug("%d: 0x%p - 0x%p (%s) -> ", i,
- (void *)cur->guest_start, (void *)(cur->guest_end - 1),
- cur->guest_type == GUEST_REGION_PHYSICAL_MEMORY ? "GUEST_REGION_PHYSICAL_MEMORY" :
- cur->guest_type == GUEST_REGION_NOTHING ? "GUEST_REGION_NOTHING" :
- cur->guest_type == GUEST_REGION_MEMORY_MAPPED_DEVICE ? "GUEST_REGION_MEMORY_MAPPED_DEVICE" :
- "UNKNOWN");
- if (cur->host_type == HOST_REGION_PHYSICAL_MEMORY ||
- cur->host_type == HOST_REGION_UNALLOCATED ||
- cur->host_type == HOST_REGION_MEMORY_MAPPED_DEVICE) {
+ PrintDebug("%d: 0x%p - 0x%p -> ", i,
+ (void *)cur->guest_start, (void *)(cur->guest_end - 1));
+ if (cur->host_type == SHDW_REGION_ALLOCATED ||
+ cur->host_type == SHDW_REGION_UNALLOCATED) {
PrintDebug("0x%p", (void *)(cur->host_addr));
}
- PrintDebug("(%s)\n",
- cur->host_type == HOST_REGION_PHYSICAL_MEMORY ? "HOST_REGION_PHYSICAL_MEMORY" :
- cur->host_type == HOST_REGION_UNALLOCATED ? "HOST_REGION_UNALLOACTED" :
- cur->host_type == HOST_REGION_HOOK ? "HOST_REGION_HOOK" :
- cur->host_type == HOST_REGION_MEMORY_MAPPED_DEVICE ? "HOST_REGION_MEMORY_MAPPED_DEVICE" :
- cur->host_type == HOST_REGION_REMOTE ? "HOST_REGION_REMOTE" :
- cur->host_type == HOST_REGION_SWAPPED ? "HOST_REGION_SWAPPED" :
- "UNKNOWN");
+ PrintDebug("(%s)\n", shdw_region_type_to_str(cur->host_type));
cur = cur->next;
i++;
}
}
+static const uchar_t SHDW_REGION_INVALID_STR[] = "SHDW_REGION_INVALID";
+static const uchar_t SHDW_REGION_WRITE_HOOK_STR[] = "SHDW_REGION_WRITE_HOOK";
+static const uchar_t SHDW_REGION_FULL_HOOK_STR[] = "SHDW_REGION_FULL_HOOK";
+static const uchar_t SHDW_REGION_ALLOCATED_STR[] = "SHDW_REGION_ALLOCATED";
+static const uchar_t SHDW_REGION_UNALLOCATED_STR[] = "SHDW_REGION_UNALLOCATED";
+
+
+const uchar_t * shdw_region_type_to_str(shdw_region_type_t type) {
+ switch (type) {
+ case SHDW_REGION_INVALID:
+ return SHDW_REGION_INVALID_STR;
+ case SHDW_REGION_WRITE_HOOK:
+ return SHDW_REGION_WRITE_HOOK_STR;
+ case SHDW_REGION_FULL_HOOK:
+ return SHDW_REGION_FULL_HOOK_STR;
+ case SHDW_REGION_ALLOCATED:
+ return SHDW_REGION_ALLOCATED_STR;
+ case SHDW_REGION_UNALLOCATED:
+ return SHDW_REGION_UNALLOCATED_STR;
+ default:
+ return SHDW_REGION_INVALID_STR;
+ }
+}
