| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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) |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 37 | #ifdef CONFIG_PREEMPTION |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |