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 13 .globl \name 14\name: 15 pushl %eax 16 pushl %ecx 17 pushl %edx 18 19 .if \put_ret_addr_in_eax 20 /* Place EIP in the arg1 */ 21 movl 3*4(%esp), %eax 22 .endif 23 24 call \func 25 popl %edx 26 popl %ecx 27 popl %eax 28 ret 29 _ASM_NOKPROBE(\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_PREEMPT 38 THUNK ___preempt_schedule, preempt_schedule 39 THUNK ___preempt_schedule_notrace, preempt_schedule_notrace 40 EXPORT_SYMBOL(___preempt_schedule) 41 EXPORT_SYMBOL(___preempt_schedule_notrace) 42#endif 43 44