fixed cr0 reads from long mode

diff --git a/palacios/src/palacios/vmm_ctrl_regs.c b/palacios/src/palacios/vmm_ctrl_regs.c
index e36b2fe..75d11f0 100644 (file)
--- a/palacios/src/palacios/vmm_ctrl_regs.c
+++ b/palacios/src/palacios/vmm_ctrl_regs.c
@@ -229,20 +229,35 @@ int v3_handle_cr0_read(struct guest_info * info) {
     }
     
     if (dec_instr.op_type == V3_OP_MOVCR2) {
-       struct cr0_32 * dst_reg = (struct cr0_32 *)(dec_instr.dst_operand.operand);
-       struct cr0_32 * shadow_cr0 = (struct cr0_32 *)&(info->ctrl_regs.cr0);
-       
        PrintDebug("MOVCR2 (mode=%s)\n", v3_cpu_mode_to_str(info->cpu_mode));
+
+       if ((v3_get_cpu_mode(info) == LONG) || 
+           (v3_get_cpu_mode(info) == LONG_32_COMPAT)) {
+           struct cr0_64 * dst_reg = (struct cr0_64 *)(dec_instr.dst_operand.operand);
        
-       if (info->shdw_pg_mode == SHADOW_PAGING) {
-           struct cr0_32 * guest_cr0 = (struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
-           *dst_reg = *guest_cr0;
+           if (info->shdw_pg_mode == SHADOW_PAGING) {
+               struct cr0_64 * guest_cr0 = (struct cr0_64 *)&(info->shdw_pg_state.guest_cr0);
+               *dst_reg = *guest_cr0;
+           } else {
+               struct cr0_64 * shadow_cr0 = (struct cr0_64 *)&(info->ctrl_regs.cr0);
+               *dst_reg = *shadow_cr0;
+           }
+
+           PrintDebug("returned CR0: %p\n", (void *)*dst_reg);
        } else {
-           *dst_reg = *shadow_cr0;
-       }
+           struct cr0_32 * dst_reg = (struct cr0_32 *)(dec_instr.dst_operand.operand);
        
-       PrintDebug("Shadow CR0: %x\n", *(uint_t*)shadow_cr0);    
-       PrintDebug("returned CR0: %x\n", *(uint_t*)dst_reg);
+           if (info->shdw_pg_mode == SHADOW_PAGING) {
+               struct cr0_32 * guest_cr0 = (struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
+               *dst_reg = *guest_cr0;
+           } else {
+               struct cr0_32 * shadow_cr0 = (struct cr0_32 *)&(info->ctrl_regs.cr0);
+               *dst_reg = *shadow_cr0;
+           }
+
+           PrintDebug("returned CR0: %x\n", *(uint_t*)dst_reg);
+       }
+
     } else if (dec_instr.op_type == V3_OP_SMSW) {
        struct cr0_real * shadow_cr0 = (struct cr0_real *)&(info->ctrl_regs.cr0);
        struct cr0_real * dst_reg = (struct cr0_real *)(dec_instr.dst_operand.operand);