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 * Added trace_hardirqs callers - Copyright 2007 Steven Rostedt, Red Hat, Inc.
 6 * Subject to the GNU public license, v.2. No warranty of any kind.
 7 */
 8#include <linux/linkage.h>
 9#include <asm/dwarf2.h>
10#include <asm/calling.h>
11
12	/* rdi:	arg1 ... normal C conventions. rax is saved/restored. */
13	.macro THUNK name, func, put_ret_addr_in_rdi=0
14	.globl \name
15\name:
16	CFI_STARTPROC
17
18	/* this one pushes 9 elems, the next one would be %rIP */
19	SAVE_ARGS
20
21	.if \put_ret_addr_in_rdi
22	movq_cfi_restore 9*8, rdi
23	.endif
24
25	call \func
26	jmp  restore
27	CFI_ENDPROC
28	.endm
29
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
33#endif
34
35#ifdef CONFIG_DEBUG_LOCK_ALLOC
36	THUNK lockdep_sys_exit_thunk,lockdep_sys_exit
37#endif
38
39	/* SAVE_ARGS below is used only for the .cfi directives it contains. */
40	CFI_STARTPROC
41	SAVE_ARGS
42restore:
43	RESTORE_ARGS
44	ret
45	CFI_ENDPROC