projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cc1e684a AK |
1 | /* |
| 2 | * Save registers before calling assembly functions. This avoids | |
| 3 | * disturbance of register allocation in some inline assembly constructs. | |
| 4 | * Copyright 2001,2002 by Andi Kleen, SuSE Labs. | |
| 81d68a96 | 5 | * Added trace_hardirqs callers - Copyright 2007 Steven Rostedt, Red Hat, Inc. |
| cc1e684a AK |
6 | * Subject to the GNU public license, v.2. No warranty of any kind. |
| 7 | */ | |
| 38e6b75d | 8 | #include <linux/linkage.h> |
| d36f9479 | 9 | #include "calling.h" |
| 98def1de | 10 | #include <asm/asm.h> |
| 1da177e4 | 11 | |
| 38e6b75d BP |
12 | /* rdi: arg1 ... normal C conventions. rax is saved/restored. */ |
| 13 | .macro THUNK name, func, put_ret_addr_in_rdi=0 | |
| 81d68a96 SR |
14 | .globl \name |
| 15 | \name: | |
| 38e6b75d BP |
16 | |
| 17 | /* this one pushes 9 elems, the next one would be %rIP */ | |
| 131484c8 IM |
18 | pushq %rdi |
| 19 | pushq %rsi | |
| 20 | pushq %rdx | |
| 21 | pushq %rcx | |
| 22 | pushq %rax | |
| 23 | pushq %r8 | |
| 24 | pushq %r9 | |
| 25 | pushq %r10 | |
| 26 | pushq %r11 | |
| 38e6b75d BP |
27 | |
| 28 | .if \put_ret_addr_in_rdi | |
| 69e8544c | 29 | /* 9*8(%rsp) is return addr on stack */ |
| 131484c8 | 30 | movq 9*8(%rsp), %rdi |
| 38e6b75d BP |
31 | .endif |
| 32 | ||
| 81d68a96 SR |
33 | call \func |
| 34 | jmp restore | |
| 98def1de | 35 | _ASM_NOKPROBE(\name) |
| 81d68a96 SR |
36 | .endm |
| 37 | ||
| 38e6b75d BP |
38 | #ifdef CONFIG_TRACE_IRQFLAGS |
| 39 | THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1 | |
| 40 | THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1 | |
| 6375e2b7 | 41 | #endif |
| 10cd706d PZ |
42 | |
| 43 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
| 38e6b75d | 44 | THUNK lockdep_sys_exit_thunk,lockdep_sys_exit |
| 10cd706d | 45 | #endif |
| 38e6b75d | 46 | |
| 0ad6e3c5 ON |
47 | #ifdef CONFIG_PREEMPT |
| 48 | THUNK ___preempt_schedule, preempt_schedule | |
| 4eaca0a8 | 49 | THUNK ___preempt_schedule_notrace, preempt_schedule_notrace |
| 0ad6e3c5 ON |
50 | #endif |
| 51 | ||
| 69e8544c DV |
52 | #if defined(CONFIG_TRACE_IRQFLAGS) \ |
| 53 | || defined(CONFIG_DEBUG_LOCK_ALLOC) \ | |
| 54 | || defined(CONFIG_PREEMPT) | |
| 1da177e4 | 55 | restore: |
| 131484c8 IM |
56 | popq %r11 |
| 57 | popq %r10 | |
| 58 | popq %r9 | |
| 59 | popq %r8 | |
| 60 | popq %rax | |
| 61 | popq %rcx | |
| 62 | popq %rdx | |
| 63 | popq %rsi | |
| 64 | popq %rdi | |
| 38e6b75d | 65 | ret |
| 98def1de | 66 | _ASM_NOKPROBE(restore) |
| 69e8544c | 67 | #endif |