| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash) |
| * Copyright 2008 by Steven Rostedt, Red Hat, Inc |
| * (inspired by Andi Kleen's thunk_64.S) |
| */ |
| #include <linux/linkage.h> |
| #include <asm/asm.h> |
| #include <asm/export.h> |
| |
| /* put return address in eax (arg1) */ |
| .macro THUNK name, func, put_ret_addr_in_eax=0 |
| SYM_CODE_START_NOALIGN(\name) |
| pushl %eax |
| pushl %ecx |
| pushl %edx |
| |
| .if \put_ret_addr_in_eax |
| /* Place EIP in the arg1 */ |
| movl 3*4(%esp), %eax |
| .endif |
| |
| call \func |
| popl %edx |
| popl %ecx |
| popl %eax |
| ret |
| _ASM_NOKPROBE(\name) |
| SYM_CODE_END(\name) |
| .endm |
| |
| #ifdef CONFIG_TRACE_IRQFLAGS |
| THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1 |
| THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1 |
| #endif |
| |
| #ifdef CONFIG_PREEMPTION |
| THUNK ___preempt_schedule, preempt_schedule |
| THUNK ___preempt_schedule_notrace, preempt_schedule_notrace |
| EXPORT_SYMBOL(___preempt_schedule) |
| EXPORT_SYMBOL(___preempt_schedule_notrace) |
| #endif |
| |
