blob: e009251d4e9f3afa3874e2ab48bd2d6cd28a83ae [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
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 #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
Sam Ravnborgc6c2d7a2008-01-30 13:33:37 +010036 .section .sched.text, "ax"
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Ingo Molnar6375e2b2006-07-03 00:24:45 -070044#ifdef CONFIG_TRACE_IRQFLAGS
45 thunk trace_hardirqs_on_thunk,trace_hardirqs_on
46 thunk trace_hardirqs_off_thunk,trace_hardirqs_off
47#endif
Peter Zijlstra10cd7062007-10-11 22:11:12 +020048
49#ifdef CONFIG_DEBUG_LOCK_ALLOC
50 thunk lockdep_sys_exit_thunk,lockdep_sys_exit
51#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53 /* SAVE_ARGS below is used only for the .cfi directives it contains. */
54 CFI_STARTPROC
55 SAVE_ARGS
56restore:
57 RESTORE_ARGS
58 ret
59 CFI_ENDPROC
60
61 CFI_STARTPROC
62 SAVE_ARGS
63restore_norax:
64 RESTORE_ARGS 1
65 ret
66 CFI_ENDPROC