arch/x86/include/asm/insn-eval.h

   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 int insn_fetch_from_user_inatomic(struct pt_regs *regs,
  27                                   unsigned char buf[MAX_INSN_SIZE]);
  28 bool insn_decode(struct insn *insn, struct pt_regs *regs,
  29                  unsigned char buf[MAX_INSN_SIZE], int buf_size);
  30
  31 #endif /* _ASM_X86_INSN_EVAL_H */