1#ifndef _ASM_X86_INSN_EVAL_H
2#define _ASM_X86_INSN_EVAL_H
3/*
4 * A collection of utility functions for x86 instruction analysis to be
5 * used in a kernel context. Useful when, for instance, making sense
6 * of the registers indicated by operands.
7 */
8
9#include <linux/compiler.h>
10#include <linux/bug.h>
11#include <linux/err.h>
12#include <asm/ptrace.h>
13
14#define INSN_CODE_SEG_ADDR_SZ(params) ((params >> 4) & 0xf)
15#define INSN_CODE_SEG_OPND_SZ(params) (params & 0xf)
16#define INSN_CODE_SEG_PARAMS(oper_sz, addr_sz) (oper_sz | (addr_sz << 4))
17
18int pt_regs_offset(struct pt_regs *regs, int regno);
19
20bool insn_has_rep_prefix(struct insn *insn);
21void __user *insn_get_addr_ref(struct insn *insn, struct pt_regs *regs);
22int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs *regs);
23int insn_get_modrm_reg_off(struct insn *insn, struct pt_regs *regs);
24unsigned long *insn_get_modrm_reg_ptr(struct insn *insn, struct pt_regs *regs);
25unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx);
26int insn_get_code_seg_params(struct pt_regs *regs);
27int insn_get_effective_ip(struct pt_regs *regs, unsigned long *ip);
28int insn_fetch_from_user(struct pt_regs *regs,
29 unsigned char buf[MAX_INSN_SIZE]);
30int insn_fetch_from_user_inatomic(struct pt_regs *regs,
31 unsigned char buf[MAX_INSN_SIZE]);
32bool insn_decode_from_regs(struct insn *insn, struct pt_regs *regs,
33 unsigned char buf[MAX_INSN_SIZE], int buf_size);
34
35enum insn_mmio_type {
36 INSN_MMIO_DECODE_FAILED,
37 INSN_MMIO_WRITE,
38 INSN_MMIO_WRITE_IMM,
39 INSN_MMIO_READ,
40 INSN_MMIO_READ_ZERO_EXTEND,
41 INSN_MMIO_READ_SIGN_EXTEND,
42 INSN_MMIO_MOVS,
43};
44
45enum insn_mmio_type insn_decode_mmio(struct insn *insn, int *bytes);
46
47#endif /* _ASM_X86_INSN_EVAL_H */
48