1 files changed, 47 insertions, 0 deletions
diff --git a/arch/x86/include/asm/insn-eval.h b/arch/x86/include/asm/insn-eval.h
new file mode 100644
index 000000000..f07faa61c
--- /dev/null
+++ b/arch/x86/include/asm/insn-eval.h
@@ -0,0 +1,47 @@
+#ifndef _ASM_X86_INSN_EVAL_H
+#define _ASM_X86_INSN_EVAL_H
+/*
+ * A collection of utility functions for x86 instruction analysis to be
+ * used in a kernel context. Useful when, for instance, making sense
+ * of the registers indicated by operands.
+ */
+
+#include <linux/compiler.h>
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <asm/ptrace.h>
+
+#define INSN_CODE_SEG_ADDR_SZ(params) ((params >> 4) & 0xf)
+#define INSN_CODE_SEG_OPND_SZ(params) (params & 0xf)
+#define INSN_CODE_SEG_PARAMS(oper_sz, addr_sz) (oper_sz | (addr_sz << 4))
+
+int pt_regs_offset(struct pt_regs *regs, int regno);
+
+bool insn_has_rep_prefix(struct insn *insn);
+void __user *insn_get_addr_ref(struct insn *insn, struct pt_regs *regs);
+int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs *regs);
+int insn_get_modrm_reg_off(struct insn *insn, struct pt_regs *regs);
+unsigned long *insn_get_modrm_reg_ptr(struct insn *insn, struct pt_regs *regs);
+unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx);
+int insn_get_code_seg_params(struct pt_regs *regs);
+int insn_get_effective_ip(struct pt_regs *regs, unsigned long *ip);
+int insn_fetch_from_user(struct pt_regs *regs,
+			 unsigned char buf[MAX_INSN_SIZE]);
+int insn_fetch_from_user_inatomic(struct pt_regs *regs,
+				  unsigned char buf[MAX_INSN_SIZE]);
+bool insn_decode_from_regs(struct insn *insn, struct pt_regs *regs,
+			   unsigned char buf[MAX_INSN_SIZE], int buf_size);
+
+enum mmio_type {
+	MMIO_DECODE_FAILED,
+	MMIO_WRITE,
+	MMIO_WRITE_IMM,
+	MMIO_READ,
+	MMIO_READ_ZERO_EXTEND,
+	MMIO_READ_SIGN_EXTEND,
+	MMIO_MOVS,
+};
+
+enum mmio_type insn_decode_mmio(struct insn *insn, int *bytes);
+
+#endif /* _ASM_X86_INSN_EVAL_H */