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 */
134 extern void insn_init(struct insn *insn, const void *kaddr, int buf_len, int x86_64);
135 extern int insn_get_prefixes(struct insn *insn);
136 extern int insn_get_opcode(struct insn *insn);
137 extern int insn_get_modrm(struct insn *insn);
138 extern int insn_get_sib(struct insn *insn);
139 extern int insn_get_displacement(struct insn *insn);
140 extern int insn_get_immediate(struct insn *insn);
141 extern int insn_get_length(struct insn *insn);
151 extern int insn_decode(struct insn *insn, const void *kaddr, int buf_len, enum insn_mode m);
156 static inline void insn_get_attribute(struct insn *insn)
158 	insn_get_modrm(insn);
162 extern int insn_rip_relative(struct insn *insn);
164 static inline int insn_is_avx(struct insn *insn)
166 	if (!insn->prefixes.got)
167 		insn_get_prefixes(insn);
168 	return (insn->vex_prefix.value != 0);
171 static inline int insn_is_evex(struct insn *insn)
173 	if (!insn->prefixes.got)
174 		insn_get_prefixes(insn);
175 	return (insn->vex_prefix.nbytes == 4);
178 static inline int insn_has_emulate_prefix(struct insn *insn)
180 	return !!insn->emulate_prefix_size;
183 static inline insn_byte_t insn_vex_m_bits(struct insn *insn)
185 	if (insn->vex_prefix.nbytes == 2)	/* 2 bytes VEX */
187 	else if (insn->vex_prefix.nbytes == 3)	/* 3 bytes VEX */
188 		return X86_VEX3_M(insn->vex_prefix.bytes[1]);
190 		return X86_EVEX_M(insn->vex_prefix.bytes[1]);
193 static inline insn_byte_t insn_vex_p_bits(struct insn *insn)
195 	if (insn->vex_prefix.nbytes == 2)	/* 2 bytes VEX */
196 		return X86_VEX_P(insn->vex_prefix.bytes[1]);
198 		return X86_VEX_P(insn->vex_prefix.bytes[2]);
202 static inline int insn_last_prefix_id(struct insn *insn)
204 	if (insn_is_avx(insn))
205 		return insn_vex_p_bits(insn);	/* VEX_p is a SIMD prefix id */
207 	if (insn->prefixes.bytes[3])
208 		return inat_get_last_prefix_id(insn->prefixes.bytes[3]);
214 static inline int insn_offset_rex_prefix(struct insn *insn)
216 	return insn->prefixes.nbytes;
218 static inline int insn_offset_vex_prefix(struct insn *insn)
220 	return insn_offset_rex_prefix(insn) + insn->rex_prefix.nbytes;
222 static inline int insn_offset_opcode(struct insn *insn)
224 	return insn_offset_vex_prefix(insn) + insn->vex_prefix.nbytes;
226 static inline int insn_offset_modrm(struct insn *insn)
228 	return insn_offset_opcode(insn) + insn->opcode.nbytes;
230 static inline int insn_offset_sib(struct insn *insn)
232 	return insn_offset_modrm(insn) + insn->modrm.nbytes;
234 static inline int insn_offset_displacement(struct insn *insn)
236 	return insn_offset_sib(insn) + insn->sib.nbytes;
238 static inline int insn_offset_immediate(struct insn *insn)
240 	return insn_offset_displacement(insn) + insn->displacement.nbytes;
245  * @insn: Pointer to struct insn.
249  * Iterate prefix bytes of given @insn. Each prefix byte is stored in @prefix
255 #define for_each_insn_prefix(insn, idx, prefix)	\
256 	for (idx = 0; idx < ARRAY_SIZE(insn->prefixes.bytes) && (prefix = insn->prefixes.bytes[idx]) != 0; idx++)
266  * This function returns true if @insn is MOV SS or POP SS. On these
269 static inline int insn_masking_exception(struct insn *insn)
271 	return insn->opcode.bytes[0] == POP_SS_OPCODE ||
272 		(insn->opcode.bytes[0] == MOV_SREG_OPCODE &&
273 		 X86_MODRM_REG(insn->modrm.bytes[0]) == 2);