1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash) 4 * Copyright 2008 by Steven Rostedt, Red Hat, Inc 5 * (inspired by Andi Kleen's thunk_64.S) 6 */ 7 #include <linux/linkage.h> 8 #include <asm/asm.h> 9 #include <asm/export.h> 10 11 /* put return address in eax (arg1) */ 12 .macro THUNK name, func, put_ret_addr_in_eax=0 13SYM_CODE_START_NOALIGN(\name) 14 pushl %eax 15 pushl %ecx 16 pushl %edx 17 18 .if \put_ret_addr_in_eax 19 /* Place EIP in the arg1 */ 20 movl 3*4(%esp), %eax 21 .endif 22 23 call \func 24 popl %edx 25 popl %ecx 26 popl %eax 27 ret 28 _ASM_NOKPROBE(\name) 29SYM_CODE_END(\name) 30 .endm 31 32#ifdef CONFIG_TRACE_IRQFLAGS 33 THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1 34 THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1 35#endif 36 37#ifdef CONFIG_PREEMPTION 38 THUNK preempt_schedule_thunk, preempt_schedule 39 THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace 40 EXPORT_SYMBOL(preempt_schedule_thunk) 41 EXPORT_SYMBOL(preempt_schedule_notrace_thunk) 42#endif 43 44