+/* (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> */
+/* (c) 2008, The V3VEE Project <http://www.v3vee.org> */
+
#ifndef __VMM_EMULATE_H
#define __VMM_EMULATE_H
#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;
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
struct x86_instr {
- uint_t instr_length; // output
- addr_t opcode; // output
- uint_t opcode_length; // output
- struct x86_prefix_list prefixes; // output
- struct x86_operand src_operand; // output
- struct x86_operand dst_operand; // output
- struct x86_operand extra_operand;
+ 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_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 */
/************************/
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);
-#define MAKE_INSTR(nm, ...) static const uchar_t OPCODE_##nm[] = { __VA_ARGS__ }
+#define MAKE_INSTR(nm, ...) static const uchar_t V3_OPCODE_##nm[] = { __VA_ARGS__ }
/*
* Here's how it works:
#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