8faceb3292
This instruction moves a byte from a register to a memory location. Tested by: tycho nightingale at pluribusnetworks com
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/*-
|
|
* Copyright (c) 2012 NetApp, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _VMM_INSTRUCTION_EMUL_H_
|
|
#define _VMM_INSTRUCTION_EMUL_H_
|
|
|
|
/*
|
|
* The data structures 'vie' and 'vie_op' are meant to be opaque to the
|
|
* consumers of instruction decoding. The only reason why their contents
|
|
* need to be exposed is because they are part of the 'vm_exit' structure.
|
|
*/
|
|
struct vie_op {
|
|
uint8_t op_byte; /* actual opcode byte */
|
|
uint8_t op_type; /* type of operation (e.g. MOV) */
|
|
uint16_t op_flags;
|
|
};
|
|
|
|
#define VIE_INST_SIZE 15
|
|
struct vie {
|
|
uint8_t inst[VIE_INST_SIZE]; /* instruction bytes */
|
|
uint8_t num_valid; /* size of the instruction */
|
|
uint8_t num_processed;
|
|
|
|
uint8_t rex_w:1, /* REX prefix */
|
|
rex_r:1,
|
|
rex_x:1,
|
|
rex_b:1,
|
|
rex_present:1;
|
|
|
|
uint8_t mod:2, /* ModRM byte */
|
|
reg:4,
|
|
rm:4;
|
|
|
|
uint8_t ss:2, /* SIB byte */
|
|
index:4,
|
|
base:4;
|
|
|
|
uint8_t disp_bytes;
|
|
uint8_t imm_bytes;
|
|
|
|
uint8_t scale;
|
|
int base_register; /* VM_REG_GUEST_xyz */
|
|
int index_register; /* VM_REG_GUEST_xyz */
|
|
|
|
int64_t displacement; /* optional addr displacement */
|
|
int64_t immediate; /* optional immediate operand */
|
|
|
|
uint8_t decoded; /* set to 1 if successfully decoded */
|
|
|
|
struct vie_op op; /* opcode description */
|
|
};
|
|
|
|
/*
|
|
* Callback functions to read and write memory regions.
|
|
*/
|
|
typedef int (*mem_region_read_t)(void *vm, int cpuid, uint64_t gpa,
|
|
uint64_t *rval, int rsize, void *arg);
|
|
|
|
typedef int (*mem_region_write_t)(void *vm, int cpuid, uint64_t gpa,
|
|
uint64_t wval, int wsize, void *arg);
|
|
|
|
/*
|
|
* Emulate the decoded 'vie' instruction.
|
|
*
|
|
* The callbacks 'mrr' and 'mrw' emulate reads and writes to the memory region
|
|
* containing 'gpa'. 'mrarg' is an opaque argument that is passed into the
|
|
* callback functions.
|
|
*
|
|
* 'void *vm' should be 'struct vm *' when called from kernel context and
|
|
* 'struct vmctx *' when called from user context.
|
|
* s
|
|
*/
|
|
int vmm_emulate_instruction(void *vm, int cpuid, uint64_t gpa, struct vie *vie,
|
|
mem_region_read_t mrr, mem_region_write_t mrw,
|
|
void *mrarg);
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* APIs to fetch and decode the instruction from nested page fault handler.
|
|
*/
|
|
int vmm_fetch_instruction(struct vm *vm, int cpuid,
|
|
uint64_t rip, int inst_length, uint64_t cr3,
|
|
struct vie *vie);
|
|
|
|
int vmm_decode_instruction(struct vm *vm, int cpuid,
|
|
uint64_t gla, struct vie *vie);
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _VMM_INSTRUCTION_EMUL_H_ */
|