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Commit | Line | Data |
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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. | |
5 | * Subject to the GNU public license, v.2. No warranty of any kind. | |
6 | */ | |
1da177e4 | 7 | |
1da177e4 LT |
8 | #include <linux/linkage.h> |
9 | #include <asm/dwarf2.h> | |
10 | #include <asm/calling.h> | |
11 | #include <asm/rwlock.h> | |
12 | ||
13 | /* rdi: arg1 ... normal C conventions. rax is saved/restored. */ | |
14 | .macro thunk name,func | |
15 | .globl \name | |
16 | \name: | |
17 | CFI_STARTPROC | |
18 | SAVE_ARGS | |
19 | call \func | |
20 | jmp restore | |
21 | CFI_ENDPROC | |
22 | .endm | |
23 | ||
24 | /* rdi: arg1 ... normal C conventions. rax is passed from C. */ | |
25 | .macro thunk_retrax name,func | |
26 | .globl \name | |
27 | \name: | |
28 | CFI_STARTPROC | |
29 | SAVE_ARGS | |
30 | call \func | |
31 | jmp restore_norax | |
32 | CFI_ENDPROC | |
33 | .endm | |
34 | ||
35 | ||
c6c2d7a0 | 36 | .section .sched.text, "ax" |
1da177e4 LT |
37 | #ifdef CONFIG_RWSEM_XCHGADD_ALGORITHM |
38 | thunk rwsem_down_read_failed_thunk,rwsem_down_read_failed | |
39 | thunk rwsem_down_write_failed_thunk,rwsem_down_write_failed | |
40 | thunk rwsem_wake_thunk,rwsem_wake | |
41 | thunk rwsem_downgrade_thunk,rwsem_downgrade_wake | |
42 | #endif | |
1da177e4 | 43 | |
6375e2b7 IM |
44 | #ifdef CONFIG_TRACE_IRQFLAGS |
45 | thunk trace_hardirqs_on_thunk,trace_hardirqs_on | |
46 | thunk trace_hardirqs_off_thunk,trace_hardirqs_off | |
47 | #endif | |
10cd706d PZ |
48 | |
49 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
50 | thunk lockdep_sys_exit_thunk,lockdep_sys_exit | |
51 | #endif | |
1da177e4 LT |
52 | |
53 | /* SAVE_ARGS below is used only for the .cfi directives it contains. */ | |
54 | CFI_STARTPROC | |
55 | SAVE_ARGS | |
56 | restore: | |
57 | RESTORE_ARGS | |
58 | ret | |
59 | CFI_ENDPROC | |
60 | ||
61 | CFI_STARTPROC | |
62 | SAVE_ARGS | |
63 | restore_norax: | |
64 | RESTORE_ARGS 1 | |
65 | ret | |
66 | CFI_ENDPROC |