45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
#ifndef _ASM_X86_INSN_EVAL_H
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#define _ASM_X86_INSN_EVAL_H
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/*
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* A collection of utility functions for x86 instruction analysis to be
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* used in a kernel context. Useful when, for instance, making sense
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* of the registers indicated by operands.
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*/
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#include <linux/compiler.h>
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#include <linux/bug.h>
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#include <linux/err.h>
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#include <asm/ptrace.h>
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#define INSN_CODE_SEG_ADDR_SZ(params) ((params >> 4) & 0xf)
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#define INSN_CODE_SEG_OPND_SZ(params) (params & 0xf)
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#define INSN_CODE_SEG_PARAMS(oper_sz, addr_sz) (oper_sz | (addr_sz << 4))
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bool insn_has_rep_prefix(struct insn *insn);
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void __user *insn_get_addr_ref(struct insn *insn, struct pt_regs *regs);
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int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs *regs);
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int insn_get_modrm_reg_off(struct insn *insn, struct pt_regs *regs);
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unsigned long *insn_get_modrm_reg_ptr(struct insn *insn, struct pt_regs *regs);
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unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx);
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int insn_get_code_seg_params(struct pt_regs *regs);
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int insn_fetch_from_user(struct pt_regs *regs,
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unsigned char buf[MAX_INSN_SIZE]);
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int insn_fetch_from_user_inatomic(struct pt_regs *regs,
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unsigned char buf[MAX_INSN_SIZE]);
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bool insn_decode_from_regs(struct insn *insn, struct pt_regs *regs,
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unsigned char buf[MAX_INSN_SIZE], int buf_size);
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enum mmio_type {
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MMIO_DECODE_FAILED,
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MMIO_WRITE,
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MMIO_WRITE_IMM,
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MMIO_READ,
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MMIO_READ_ZERO_EXTEND,
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MMIO_READ_SIGN_EXTEND,
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MMIO_MOVS,
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};
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enum mmio_type insn_decode_mmio(struct insn *insn, int *bytes);
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#endif /* _ASM_X86_INSN_EVAL_H */
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