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 bool insn_has_rep_prefix(struct insn *insn); 19 void __user *insn_get_addr_ref(struct insn *insn, struct pt_regs *regs); 20 int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs *regs); 21 int insn_get_modrm_reg_off(struct insn *insn, struct pt_regs *regs); 22 unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx); 23 int insn_get_code_seg_params(struct pt_regs *regs); 24 int insn_fetch_from_user(struct pt_regs *regs, 25 unsigned char buf[MAX_INSN_SIZE]); 26 bool insn_decode(struct insn *insn, struct pt_regs *regs, 27 unsigned char buf[MAX_INSN_SIZE], int buf_size); 28 29 #endif /* _ASM_X86_INSN_EVAL_H */ 30