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 18 int pt_regs_offset(struct pt_regs *regs, int regno); 19 20 bool insn_has_rep_prefix(struct insn *insn); 21 void __user *insn_get_addr_ref(struct insn *insn, struct pt_regs *regs); 22 int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs *regs); 23 int insn_get_modrm_reg_off(struct insn *insn, struct pt_regs *regs); 24 unsigned long *insn_get_modrm_reg_ptr(struct insn *insn, struct pt_regs *regs); 25 unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx); 26 int insn_get_code_seg_params(struct pt_regs *regs); 27 int insn_get_effective_ip(struct pt_regs *regs, unsigned long *ip); 28 int insn_fetch_from_user(struct pt_regs *regs, 29 unsigned char buf[MAX_INSN_SIZE]); 30 int insn_fetch_from_user_inatomic(struct pt_regs *regs, 31 unsigned char buf[MAX_INSN_SIZE]); 32 bool insn_decode_from_regs(struct insn *insn, struct pt_regs *regs, 33 unsigned char buf[MAX_INSN_SIZE], int buf_size); 34 35 enum 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 45 enum insn_mmio_type insn_decode_mmio(struct insn *insn, int *bytes); 46 47 #endif /* _ASM_X86_INSN_EVAL_H */ 48