blob: 0025535cac8d9fa389016d0b79b84519fab9a073 [file] [log] [blame]
Andi Kleencc1e6842006-09-26 10:52:29 +02001/*
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
8 #include <linux/config.h>
9 #include <linux/linkage.h>
10 #include <asm/dwarf2.h>
11 #include <asm/calling.h>
12 #include <asm/rwlock.h>
13
14 /* rdi: arg1 ... normal C conventions. rax is saved/restored. */
15 .macro thunk name,func
16 .globl \name
17\name:
18 CFI_STARTPROC
19 SAVE_ARGS
20 call \func
21 jmp restore
22 CFI_ENDPROC
23 .endm
24
25 /* rdi: arg1 ... normal C conventions. rax is passed from C. */
26 .macro thunk_retrax name,func
27 .globl \name
28\name:
29 CFI_STARTPROC
30 SAVE_ARGS
31 call \func
32 jmp restore_norax
33 CFI_ENDPROC
34 .endm
35
36
37 .section .sched.text
38#ifdef CONFIG_RWSEM_XCHGADD_ALGORITHM
39 thunk rwsem_down_read_failed_thunk,rwsem_down_read_failed
40 thunk rwsem_down_write_failed_thunk,rwsem_down_write_failed
41 thunk rwsem_wake_thunk,rwsem_wake
42 thunk rwsem_downgrade_thunk,rwsem_downgrade_wake
43#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45 thunk __down_failed,__down
46 thunk_retrax __down_failed_interruptible,__down_interruptible
47 thunk_retrax __down_failed_trylock,__down_trylock
48 thunk __up_wakeup,__up
Ingo Molnar6375e2b2006-07-03 00:24:45 -070049
50#ifdef CONFIG_TRACE_IRQFLAGS
51 thunk trace_hardirqs_on_thunk,trace_hardirqs_on
52 thunk trace_hardirqs_off_thunk,trace_hardirqs_off
53#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55 /* SAVE_ARGS below is used only for the .cfi directives it contains. */
56 CFI_STARTPROC
57 SAVE_ARGS
58restore:
59 RESTORE_ARGS
60 ret
61 CFI_ENDPROC
62
63 CFI_STARTPROC
64 SAVE_ARGS
65restore_norax:
66 RESTORE_ARGS 1
67 ret
68 CFI_ENDPROC