#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;
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 first_operand;
+ struct x86_operand second_operand;
+ struct x86_operand third_operand;
+ void * decoder_data;
};
This is an External API definition that must be implemented by a decoder
*/
+
+/*
+ * Initializes a decoder
+ */
+int init_decoder();
+
/*
* Decodes an instruction
* All addresses in arguments are in the host address space
-#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