projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 81d68a96 SR |
1 | /* |
| 2 | * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash) | |
| 3 | * Copyright 2008 by Steven Rostedt, Red Hat, Inc | |
| 4 | * (inspired by Andi Kleen's thunk_64.S) | |
| 5 | * Subject to the GNU public license, v.2. No warranty of any kind. | |
| 6 | */ | |
| 81d68a96 | 7 | #include <linux/linkage.h> |
| 98def1de | 8 | #include <asm/asm.h> |
| 784d5699 | 9 | #include <asm/export.h> |
| 81d68a96 | 10 | |
| 81d68a96 | 11 | /* put return address in eax (arg1) */ |
| 0ad6e3c5 | 12 | .macro THUNK name, func, put_ret_addr_in_eax=0 |
| 81d68a96 SR |
13 | .globl \name |
| 14 | \name: | |
| 131484c8 IM |
15 | pushl %eax |
| 16 | pushl %ecx | |
| 17 | pushl %edx | |
| 0ad6e3c5 ON |
18 | |
| 19 | .if \put_ret_addr_in_eax | |
| 81d68a96 SR |
20 | /* Place EIP in the arg1 */ |
| 21 | movl 3*4(%esp), %eax | |
| 0ad6e3c5 ON |
22 | .endif |
| 23 | ||
| 81d68a96 | 24 | call \func |
| 131484c8 IM |
25 | popl %edx |
| 26 | popl %ecx | |
| 27 | popl %eax | |
| 81d68a96 | 28 | ret |
| 98def1de | 29 | _ASM_NOKPROBE(\name) |
| 81d68a96 SR |
30 | .endm |
| 31 | ||
| 0ad6e3c5 ON |
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 | |
| 4eaca0a8 | 39 | THUNK ___preempt_schedule_notrace, preempt_schedule_notrace |
| 784d5699 AV |
40 | EXPORT_SYMBOL(___preempt_schedule) |
| 41 | EXPORT_SYMBOL(___preempt_schedule_notrace) | |
| 0ad6e3c5 ON |
42 | #endif |
| 43 |