added copyright tags

[palacios.git] / palacios / include / palacios / vmm_decoder.h

diff --git a/palacios/include/palacios/vmm_decoder.h b/palacios/include/palacios/vmm_decoder.h
index ddbf9f8..0d4fbba 100644 (file)
--- a/palacios/include/palacios/vmm_decoder.h
+++ b/palacios/include/palacios/vmm_decoder.h
@@ -1,3 +1,6 @@
+/* Northwestern University */
+/* (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> */
+
 #ifndef __VMM_EMULATE_H
 #define __VMM_EMULATE_H
 
@@ -6,16 +9,8 @@
 #include <palacios/vm_guest.h>
 #include <palacios/vmm.h>
 
-/*
- * This is where we do the hideous X86 instruction parsing among other things
- * We can parse out the instruction prefixes, as well as decode the operands 
- */
-
-
 
-
-
-typedef enum {INVALID_OPERAND, REG_OPERAND, MEM_OPERAND} operand_type_t;
+typedef enum {INVALID_OPERAND, REG_OPERAND, MEM_OPERAND, IMM_OPERAND} operand_type_t;
 
 struct x86_operand {
   addr_t operand;
@@ -23,7 +18,7 @@ struct x86_operand {
   operand_type_t type;
 };
 
-struct x86_prefix_list {
+struct x86_prefixes {
   uint_t lock   : 1;  // 0xF0
   uint_t repne  : 1;  // 0xF2
   uint_t repnz  : 1;  // 0xF2
@@ -44,17 +39,26 @@ struct x86_prefix_list {
 
 
 struct x86_instr {
+  struct x86_prefixes prefixes;
   uint_t instr_length;
   addr_t opcode;    // a pointer to the V3_OPCODE_[*] arrays defined below
   uint_t num_operands;
-  struct x86_prefix_list prefixes;
-  struct x86_operand first_operand;
-  struct x86_operand second_operand;
+  struct x86_operand dst_operand;
+  struct x86_operand src_operand;
   struct x86_operand third_operand;
   void * decoder_data;
 };
 
 
+struct basic_instr_info {
+  uint_t instr_length;
+  uint_t op_size;
+  uint_t str_op    : 1;
+  uint_t has_rep : 1;
+};
+
+
+
   /************************/
  /* EXTERNAL DECODER API */
 /************************/
@@ -88,10 +92,16 @@ int v3_decode(struct guest_info * info, addr_t instr_ptr, struct x86_instr * ins
 int v3_encode(struct guest_info * info, struct x86_instr * instr, char * instr_buf);
 
 
+/*
+ * Gets the operand size for a memory operation
+ *
+ */
+int v3_basic_mem_decode(struct guest_info * info, addr_t instr_ptr, struct basic_instr_info * instr_info);
 
 
 
-
+/* Removes a rep prefix in place */
+void strip_rep_prefix(uchar_t * instr, int length);
 
 
 
@@ -181,6 +191,9 @@ MAKE_INSTR(SMSW,   3, 0x0f, 0x01, 0x00);
 #define PREFIX_OP_SIZE      0x66
 #define PREFIX_ADDR_SIZE    0x67
 
+int opcode_cmp(const uchar_t * op1, const uchar_t * op2);
+
+
 static inline int is_prefix_byte(char byte) {
   switch (byte) {
   case 0xF0:      // lock