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 "calling.h"
10#include <asm/asm.h>
11#include <asm/frame.h>
12
13	/* rdi:	arg1 ... normal C conventions. rax is saved/restored. */
14	.macro THUNK name, func, put_ret_addr_in_rdi=0
15	.globl \name
16	.type \name, @function
17\name:
18	FRAME_BEGIN
19
20	/* this one pushes 9 elems, the next one would be %rIP */
21	pushq %rdi
22	pushq %rsi
23	pushq %rdx
24	pushq %rcx
25	pushq %rax
26	pushq %r8
27	pushq %r9
28	pushq %r10
29	pushq %r11
30
31	.if \put_ret_addr_in_rdi
32	/* 9*8(%rsp) is return addr on stack */
33	movq 9*8(%rsp), %rdi
34	.endif
35
36	call \func
37	jmp  restore
38	_ASM_NOKPROBE(\name)
39	.endm
40
41#ifdef CONFIG_TRACE_IRQFLAGS
42	THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1
43	THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
44#endif
45
46#ifdef CONFIG_DEBUG_LOCK_ALLOC
47	THUNK lockdep_sys_exit_thunk,lockdep_sys_exit
48#endif
49
50#ifdef CONFIG_PREEMPT
51	THUNK ___preempt_schedule, preempt_schedule
52	THUNK ___preempt_schedule_notrace, preempt_schedule_notrace
53#endif
54
55#if defined(CONFIG_TRACE_IRQFLAGS) \
56 || defined(CONFIG_DEBUG_LOCK_ALLOC) \
57 || defined(CONFIG_PREEMPT)
58restore:
59	popq %r11
60	popq %r10
61	popq %r9
62	popq %r8
63	popq %rax
64	popq %rcx
65	popq %rdx
66	popq %rsi
67	popq %rdi
68	FRAME_END
69	ret
70	_ASM_NOKPROBE(restore)
71#endif