projects / mirror_ubuntu-zesty-kernel.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> |
| f74954f0 | 9 | #include <asm/dwarf2.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: | |
| f74954f0 | 15 | CFI_STARTPROC |
| 49db46a6 DV |
16 | pushl_cfi_reg eax |
| 17 | pushl_cfi_reg ecx | |
| 18 | pushl_cfi_reg edx | |
| 0ad6e3c5 ON |
19 | |
| 20 | .if \put_ret_addr_in_eax | |
| 81d68a96 SR |
21 | /* Place EIP in the arg1 */ |
| 22 | movl 3*4(%esp), %eax | |
| 0ad6e3c5 ON |
23 | .endif |
| 24 | ||
| 81d68a96 | 25 | call \func |
| 49db46a6 DV |
26 | popl_cfi_reg edx |
| 27 | popl_cfi_reg ecx | |
| 28 | popl_cfi_reg eax | |
| 81d68a96 | 29 | ret |
| f74954f0 | 30 | CFI_ENDPROC |
| 98def1de | 31 | _ASM_NOKPROBE(\name) |
| 81d68a96 SR |
32 | .endm |
| 33 | ||
| 0ad6e3c5 ON |
34 | #ifdef CONFIG_TRACE_IRQFLAGS |
| 35 | THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1 | |
| 36 | THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1 | |
| 37 | #endif | |
| 38 | ||
| 39 | #ifdef CONFIG_PREEMPT | |
| 40 | THUNK ___preempt_schedule, preempt_schedule | |
| 41 | #ifdef CONFIG_CONTEXT_TRACKING | |
| 42 | THUNK ___preempt_schedule_context, preempt_schedule_context | |
| 81d68a96 | 43 | #endif |
| 0ad6e3c5 ON |
44 | #endif |
| 45 |