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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 */
7
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
36 .section .sched.text
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
43
44 thunk __down_failed,__down
45 thunk_retrax __down_failed_interruptible,__down_interruptible
46 thunk_retrax __down_failed_trylock,__down_trylock
47 thunk __up_wakeup,__up
48
49#ifdef CONFIG_TRACE_IRQFLAGS
50 thunk trace_hardirqs_on_thunk,trace_hardirqs_on
51 thunk trace_hardirqs_off_thunk,trace_hardirqs_off
52#endif
53
54#ifdef CONFIG_DEBUG_LOCK_ALLOC
55 thunk lockdep_sys_exit_thunk,lockdep_sys_exit
56#endif
57
58 /* SAVE_ARGS below is used only for the .cfi directives it contains. */
59 CFI_STARTPROC
60 SAVE_ARGS
61restore:
62 RESTORE_ARGS
63 ret
64 CFI_ENDPROC
65
66 CFI_STARTPROC
67 SAVE_ARGS
68restore_norax:
69 RESTORE_ARGS 1
70 ret
71 CFI_ENDPROC