#include <devices/os_debug.h>
#include <palacios/vmm.h>
+#include <palacios/vm_guest_mem.h>
#define BUF_SIZE 1024
#define DEBUG_PORT1 0xc0c0
-
+#define DEBUG_HCALL 0xc0c0
struct debug_state {
char debug_buf[BUF_SIZE];
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;
+
+ int msg_len = info->vm_regs.rcx;
+ addr_t msg_gpa = info->vm_regs.rbx;
+
+ if (msg_len >= BUF_SIZE) {
+ PrintError("Console message too large for buffer (len=%d)\n", msg_len);
+ return -1;
+ }
+
+ if (read_guest_pa_memory(info, msg_gpa, msg_len, (uchar_t *)state->debug_buf) != msg_len) {
+ PrintError("Could not read debug message\n");
+ return -1;
+ }
+
+ state->debug_buf[msg_len] = 0;
+
+ PrintDebug("VM_CONSOLE>%s\n", state->debug_buf);
+
+ return 0;
+}
+
static int debug_init(struct vm_device * dev) {
struct debug_state * state = (struct debug_state *)dev->private_data;
v3_dev_hook_io(dev, DEBUG_PORT1, NULL, &handle_gen_write);
+ v3_register_hypercall(dev->vm, DEBUG_HCALL, handle_hcall, dev);
state->debug_offset = 0;
memset(state->debug_buf, 0, BUF_SIZE);