#define BUF_SIZE 1024
#define DEBUG_PORT1 0xc0c0
-#define DEBUG_HCALL 0xc0c0
+#define HEARTBEAT_PORT 0x99
struct debug_state {
char debug_buf[BUF_SIZE];
};
-static int handle_gen_write(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
- struct debug_state * state = (struct debug_state *)dev->private_data;
+static int handle_gen_write(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) {
+ struct debug_state * state = priv_data;
state->debug_buf[state->debug_offset++] = *(char*)src;
if ((*(char*)src == 0xa) || (state->debug_offset == (BUF_SIZE - 1))) {
- PrintDebug("VM_CONSOLE>%s", state->debug_buf);
+ PrintDebug(core->vm_info, core, "VM_CONSOLE>%s", state->debug_buf);
memset(state->debug_buf, 0, BUF_SIZE);
state->debug_offset = 0;
}
return length;
}
+static int handle_hb_write(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) {
+ uint32_t val = 0;
+
+ if (length == 1) {
+ val = *(uint8_t *)src;
+ } else if (length == 2) {
+ val = *(uint16_t *)src;
+ } else {
+ val = *(uint32_t *)src;
+ }
+
+ V3_Print(core->vm_info, core, "HEARTBEAT> %x (%d)\n", val, val);
+
+ return length;
+}
+
static int handle_hcall(struct guest_info * info, uint_t hcall_id, void * priv_data) {
- struct vm_device * dev = (struct vm_device *)priv_data;
- struct debug_state * state = (struct debug_state *)dev->private_data;
+ struct debug_state * state = (struct debug_state *)priv_data;
int msg_len = info->vm_regs.rcx;
addr_t msg_gpa = info->vm_regs.rbx;
int buf_is_va = info->vm_regs.rdx;
if (msg_len >= BUF_SIZE) {
- PrintError("Console message too large for buffer (len=%d)\n", msg_len);
+ PrintError(info->vm_info, info, "Console message too large for buffer (len=%d)\n", msg_len);
return -1;
}
if (buf_is_va == 1) {
- if (read_guest_va_memory(info, msg_gpa, msg_len, (uchar_t *)state->debug_buf) != msg_len) {
- PrintError("Could not read debug message\n");
+ if (v3_read_gva_memory(info, msg_gpa, msg_len, (uchar_t *)state->debug_buf) != msg_len) {
+ PrintError(info->vm_info, info, "Could not read debug message\n");
return -1;
}
} else {
- if (read_guest_pa_memory(info, msg_gpa, msg_len, (uchar_t *)state->debug_buf) != msg_len) {
- PrintError("Could not read debug message\n");
+ if (v3_read_gpa_memory(info, msg_gpa, msg_len, (uchar_t *)state->debug_buf) != msg_len) {
+ PrintError(info->vm_info, info, "Could not read debug message\n");
return -1;
}
}
state->debug_buf[msg_len] = 0;
- PrintDebug("VM_CONSOLE>%s\n", state->debug_buf);
+ PrintDebug(info->vm_info, info, "VM_CONSOLE>%s\n", state->debug_buf);
return 0;
}
-static int debug_free(struct vm_device * dev) {
- v3_dev_unhook_io(dev, DEBUG_PORT1);
+static int debug_free(struct debug_state * state) {
+ // unregister hypercall
+ V3_Free(state);
return 0;
};
+#ifdef V3_CONFIG_CHECKPOINT
+static int debug_save(struct v3_chkpt_ctx * ctx, void * private_data) {
+ struct debug_state * dbg = (struct debug_state *)private_data;
+
+ V3_CHKPT_SAVE_AUTOTAG(ctx, dbg->debug_buf, savefailout);
+ V3_CHKPT_SAVE_AUTOTAG(ctx, dbg->debug_offset, savefailout);
+
+ return 0;
+
+ savefailout:
+ PrintError(VM_NONE,VCORE_NONE, "Failed to save debug\n");
+ return -1;
+
+}
+
+
+static int debug_load(struct v3_chkpt_ctx * ctx, void * private_data) {
+ struct debug_state * dbg = (struct debug_state *)private_data;
+
+ V3_CHKPT_LOAD_AUTOTAG(ctx, dbg->debug_buf,loadfailout);
+ V3_CHKPT_LOAD_AUTOTAG(ctx, dbg->debug_offset,loadfailout);
+
+ return 0;
+
+ loadfailout:
+ PrintError(VM_NONE, VCORE_NONE, "Failed to load debug\n");
+ return -1;
+}
+
+#endif
static struct v3_device_ops dev_ops = {
- .free = debug_free,
- .reset = NULL,
- .start = NULL,
- .stop = NULL,
+ .free = (int (*)(void *))debug_free,
+#ifdef V3_CONFIG_CHECKPOINT
+ .save = debug_save,
+ .load = debug_load
+#endif
};
-static int debug_init(struct guest_info * vm, void * cfg_data) {
+static int debug_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
struct debug_state * state = NULL;
+ char * dev_id = v3_cfg_val(cfg, "ID");
state = (struct debug_state *)V3_Malloc(sizeof(struct debug_state));
- PrintDebug("Creating OS Debug Device\n");
+ if (!state) {
+ PrintError(vm, VCORE_NONE, "Cannot allocate in init\n");
+ return -1;
+ }
+
+ PrintDebug(vm, VCORE_NONE, "Creating OS Debug Device\n");
- struct vm_device * dev = v3_allocate_device("OS_DEBUG", &dev_ops, state);
+ struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, state);
+
+ if (dev == NULL) {
+ PrintError(vm, VCORE_NONE, "Could not attach device %s\n", dev_id);
+ V3_Free(state);
+ return -1;
+ }
+
+ if (v3_dev_hook_io(dev, DEBUG_PORT1, NULL, &handle_gen_write) == -1) {
+ PrintError(vm, VCORE_NONE, "Error hooking OS debug IO port\n");
+ v3_remove_device(dev);
+ return -1;
+ }
- if (v3_attach_device(vm, dev) == -1) {
- PrintError("Could not attach device %s\n", "OS_DEBUG");
+ if (v3_dev_hook_io(dev, HEARTBEAT_PORT, NULL, &handle_hb_write) == -1) {
+ PrintError(vm, VCORE_NONE, "error hooking OS heartbeat port\n");
+ v3_remove_device(dev);
return -1;
}
- v3_dev_hook_io(dev, DEBUG_PORT1, NULL, &handle_gen_write);
- v3_register_hypercall(vm, DEBUG_HCALL, handle_hcall, dev);
+ v3_register_hypercall(vm, OS_DEBUG_HCALL, handle_hcall, state);
state->debug_offset = 0;
memset(state->debug_buf, 0, BUF_SIZE);