147  * each single-byte NOPs). If @len to fill out is > ASM_NOP_MAX, pad with INT3 and
708 	 * The compiler is supposed to EMIT an INT3 after every unconditional  in patch_retpoline()
710 	 * or MITIGATION_SLS isn't enabled, we still need an INT3 after  in patch_retpoline()
1555  * Self-test for the INT3 based CALL emulation code.
1557  * This exercises int3_emulate_call() to make sure INT3 pt_regs are set up
1558  * properly and that there is a stack gap between the INT3 frame and the
1560  * stack would corrupt the INT3 IRET frame.
1621 	 * INT3 padded with NOP to CALL_INSN_SIZE. The int3_exception_nb  in int3_selftest()
1626 		      "    int3; nop; nop; nop; nop\n\t"  in int3_selftest()
2158 	 * Having observed our INT3 instruction, we now must observe  in poke_int3_handler()
2161 	 *	bp_desc.refs = 1		INT3  in poke_int3_handler()
2163 	 *	write INT3			if (bp_desc.refs != 0)  in poke_int3_handler()
2172 	 * Discount the INT3. See text_poke_bp_batch().  in poke_int3_handler()
2196 		 * Someone poked an explicit INT3, they'll want to handle it,  in poke_int3_handler()
2238  * Modify multi-byte instruction by using int3 breakpoint on SMP.
2240  * synchronization using int3 breakpoint.
2244  *		- add a int3 trap to the address that will be patched
2250  *		- replace the first byte (int3) by the first byte of
2256 	unsigned char int3 = INT3_INSN_OPCODE;  in text_poke_bp_batch()  local
2282 	 * Corresponding read barrier in int3 notifier for making sure the  in text_poke_bp_batch()
2288 	 * First step: add a int3 trap to the address that will be patched.  in text_poke_bp_batch()
2292 		text_poke(text_poke_addr(&tp[i]), &int3, INT3_INSN_SIZE);  in text_poke_bp_batch()
2328 		 *   - write INT3 byte  in text_poke_bp_batch()
2332 		 * INT3 and handler and not hit the old or new instruction.  in text_poke_bp_batch()
2333 		 * Intel PT outputs FUP/TIP packets for the INT3, so the flow  in text_poke_bp_batch()
2340 		 * either the old instruction flow or FUP/TIP of INT3. After the  in text_poke_bp_batch()
2342 		 * new instruction flow or FUP/TIP of INT3. Thus decoders can  in text_poke_bp_batch()
2361 	 * Third step: replace the first byte (int3) by the first byte of  in text_poke_bp_batch()
2419 		 * next instruction can be padded with INT3.  in text_poke_loc_init()