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 BP |
8 | #include <linux/linkage.h> |
| 9 | #include <asm/dwarf2.h> | |
| 10 | #include <asm/calling.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: | |
| 16 | CFI_STARTPROC | |
| 38e6b75d BP |
17 | |
| 18 | /* this one pushes 9 elems, the next one would be %rIP */ | |
| 81d68a96 | 19 | SAVE_ARGS |
| 38e6b75d BP |
20 | |
| 21 | .if \put_ret_addr_in_rdi | |
| 22 | movq_cfi_restore 9*8, rdi | |
| 23 | .endif | |
| 24 | ||
| 81d68a96 SR |
25 | call \func |
| 26 | jmp restore | |
| 27 | CFI_ENDPROC | |
| 28 | .endm | |
| 29 | ||
| 38e6b75d BP |
30 | #ifdef CONFIG_TRACE_IRQFLAGS |
| 31 | THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1 | |
| 32 | THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1 | |
| 6375e2b7 | 33 | #endif |
| 10cd706d PZ |
34 | |
| 35 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
| 38e6b75d | 36 | THUNK lockdep_sys_exit_thunk,lockdep_sys_exit |
| 10cd706d | 37 | #endif |
| 38e6b75d | 38 | |
| 1da177e4 LT |
39 | /* SAVE_ARGS below is used only for the .cfi directives it contains. */ |
| 40 | CFI_STARTPROC | |
| 41 | SAVE_ARGS | |
| 42 | restore: | |
| 43 | RESTORE_ARGS | |
| 38e6b75d | 44 | ret |
| 1da177e4 | 45 | CFI_ENDPROC |