include/asm/insn.h

68 struct insn {
100 	const insn_byte_t *kaddr;	/* kernel address of insn to analyze */
101 	const insn_byte_t *end_kaddr;	/* kernel address of last insn in buffer */
139 extern void insn_init(struct insn *insn, const void *kaddr, int buf_len, int x86_64);
140 extern int insn_get_prefixes(struct insn *insn);
141 extern int insn_get_opcode(struct insn *insn);
142 extern int insn_get_modrm(struct insn *insn);
143 extern int insn_get_sib(struct insn *insn);
144 extern int insn_get_displacement(struct insn *insn);
145 extern int insn_get_immediate(struct insn *insn);
146 extern int insn_get_length(struct insn *insn);
156 extern int insn_decode(struct insn *insn, const void *kaddr, int buf_len, enum insn_mode m);
161 static inline void insn_get_attribute(struct insn *insn)
163 	insn_get_modrm(insn);
167 extern int insn_rip_relative(struct insn *insn);
169 static inline int insn_is_rex2(struct insn *insn)
171 	if (!insn->prefixes.got)
172 		insn_get_prefixes(insn);
173 	return insn->rex_prefix.nbytes == 2;
176 static inline insn_byte_t insn_rex2_m_bit(struct insn *insn)
178 	return X86_REX2_M(insn->rex_prefix.bytes[1]);
181 static inline int insn_is_avx(struct insn *insn)
183 	if (!insn->prefixes.got)
184 		insn_get_prefixes(insn);
185 	return (insn->vex_prefix.value != 0);
188 static inline int insn_is_evex(struct insn *insn)
190 	if (!insn->prefixes.got)
191 		insn_get_prefixes(insn);
192 	return (insn->vex_prefix.nbytes == 4);
195 static inline int insn_has_emulate_prefix(struct insn *insn)
197 	return !!insn->emulate_prefix_size;
200 static inline insn_byte_t insn_vex_m_bits(struct insn *insn)
202 	if (insn->vex_prefix.nbytes == 2)	/* 2 bytes VEX */
204 	else if (insn->vex_prefix.nbytes == 3)	/* 3 bytes VEX */
205 		return X86_VEX3_M(insn->vex_prefix.bytes[1]);
207 		return X86_EVEX_M(insn->vex_prefix.bytes[1]);
210 static inline insn_byte_t insn_vex_p_bits(struct insn *insn)
212 	if (insn->vex_prefix.nbytes == 2)	/* 2 bytes VEX */
213 		return X86_VEX_P(insn->vex_prefix.bytes[1]);
215 		return X86_VEX_P(insn->vex_prefix.bytes[2]);
218 static inline insn_byte_t insn_vex_w_bit(struct insn *insn)
220 	if (insn->vex_prefix.nbytes < 3)
222 	return X86_VEX_W(insn->vex_prefix.bytes[2]);
226 static inline int insn_last_prefix_id(struct insn *insn)
228 	if (insn_is_avx(insn))
229 		return insn_vex_p_bits(insn);	/* VEX_p is a SIMD prefix id */
231 	if (insn->prefixes.bytes[3])
232 		return inat_get_last_prefix_id(insn->prefixes.bytes[3]);
238 static inline int insn_offset_rex_prefix(struct insn *insn)
240 	return insn->prefixes.nbytes;
242 static inline int insn_offset_vex_prefix(struct insn *insn)
244 	return insn_offset_rex_prefix(insn) + insn->rex_prefix.nbytes;
246 static inline int insn_offset_opcode(struct insn *insn)
248 	return insn_offset_vex_prefix(insn) + insn->vex_prefix.nbytes;
250 static inline int insn_offset_modrm(struct insn *insn)
252 	return insn_offset_opcode(insn) + insn->opcode.nbytes;
254 static inline int insn_offset_sib(struct insn *insn)
256 	return insn_offset_modrm(insn) + insn->modrm.nbytes;
258 static inline int insn_offset_displacement(struct insn *insn)
260 	return insn_offset_sib(insn) + insn->sib.nbytes;
262 static inline int insn_offset_immediate(struct insn *insn)
264 	return insn_offset_displacement(insn) + insn->displacement.nbytes;
269  * @insn: Pointer to struct insn.
273  * Iterate prefix bytes of given @insn. Each prefix byte is stored in @prefix
279 #define for_each_insn_prefix(insn, idx, prefix)	\
280 	for (idx = 0; idx < ARRAY_SIZE(insn->prefixes.bytes) && (prefix = insn->prefixes.bytes[idx]) != 0; idx++)
290  * This function returns true if @insn is MOV SS or POP SS. On these
293 static inline int insn_masking_exception(struct insn *insn)
295 	return insn->opcode.bytes[0] == POP_SS_OPCODE ||
296 		(insn->opcode.bytes[0] == MOV_SREG_OPCODE &&
297 		 X86_MODRM_REG(insn->modrm.bytes[0]) == 2);