1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
* Some macros to handle stack frames in assembly.
*/
#include <linux/config.h>
#define R15 0
#define R14 8
#define R13 16
#define R12 24
#define RBP 32
#define RBX 40
/* arguments: interrupts/non tracing syscalls only save upto here*/
#define R11 48
#define R10 56
#define R9 64
#define R8 72
#define RAX 80
#define RCX 88
#define RDX 96
#define RSI 104
#define RDI 112
#define ORIG_RAX 120 /* + error_code */
/* end of arguments */
/* cpu exception frame or undefined in case of fast syscall. */
#define RIP 128
#define CS 136
#define EFLAGS 144
#define RSP 152
#define SS 160
#define ARGOFFSET R11
#define SWFRAME ORIG_RAX
.macro SAVE_ARGS addskip=0,norcx=0,nor891011=0
subq $9*8+\addskip,%rsp
CFI_ADJUST_CFA_OFFSET 9*8+\addskip
movq %rdi,8*8(%rsp)
CFI_REL_OFFSET rdi,8*8
movq %rsi,7*8(%rsp)
CFI_REL_OFFSET rsi,7*8
movq %rdx,6*8(%rsp)
CFI_REL_OFFSET rdx,6*8
.if \norcx
.else
movq %rcx,5*8(%rsp)
CFI_REL_OFFSET rcx,5*8
.endif
movq %rax,4*8(%rsp)
CFI_REL_OFFSET rax,4*8
.if \nor891011
.else
movq %r8,3*8(%rsp)
CFI_REL_OFFSET r8,3*8
movq %r9,2*8(%rsp)
CFI_REL_OFFSET r9,2*8
movq %r10,1*8(%rsp)
CFI_REL_OFFSET r10,1*8
movq %r11,(%rsp)
CFI_REL_OFFSET r11,0*8
.endif
.endm
#define ARG_SKIP 9*8
.macro RESTORE_ARGS skiprax=0,addskip=0,skiprcx=0,skipr11=0,skipr8910=0,skiprdx=0
.if \skipr11
.else
movq (%rsp),%r11
.endif
.if \skipr8910
.else
movq 1*8(%rsp),%r10
movq 2*8(%rsp),%r9
movq 3*8(%rsp),%r8
.endif
.if \skiprax
.else
movq 4*8(%rsp),%rax
.endif
.if \skiprcx
.else
movq 5*8(%rsp),%rcx
.endif
.if \skiprdx
.else
movq 6*8(%rsp),%rdx
.endif
movq 7*8(%rsp),%rsi
movq 8*8(%rsp),%rdi
.if ARG_SKIP+\addskip > 0
addq $ARG_SKIP+\addskip,%rsp
CFI_ADJUST_CFA_OFFSET -(ARG_SKIP+\addskip)
.endif
.endm
.macro LOAD_ARGS offset
movq \offset(%rsp),%r11
movq \offset+8(%rsp),%r10
movq \offset+16(%rsp),%r9
movq \offset+24(%rsp),%r8
movq \offset+40(%rsp),%rcx
movq \offset+48(%rsp),%rdx
movq \offset+56(%rsp),%rsi
movq \offset+64(%rsp),%rdi
movq \offset+72(%rsp),%rax
.endm
#define REST_SKIP 6*8
.macro SAVE_REST
subq $REST_SKIP,%rsp
CFI_ADJUST_CFA_OFFSET REST_SKIP
movq %rbx,5*8(%rsp)
CFI_REL_OFFSET rbx,5*8
movq %rbp,4*8(%rsp)
CFI_REL_OFFSET rbp,4*8
movq %r12,3*8(%rsp)
CFI_REL_OFFSET r12,3*8
movq %r13,2*8(%rsp)
CFI_REL_OFFSET r13,2*8
movq %r14,1*8(%rsp)
CFI_REL_OFFSET r14,1*8
movq %r15,(%rsp)
CFI_REL_OFFSET r15,0*8
.endm
.macro RESTORE_REST
movq (%rsp),%r15
movq 1*8(%rsp),%r14
movq 2*8(%rsp),%r13
movq 3*8(%rsp),%r12
movq 4*8(%rsp),%rbp
movq 5*8(%rsp),%rbx
addq $REST_SKIP,%rsp
CFI_ADJUST_CFA_OFFSET -(REST_SKIP)
.endm
.macro SAVE_ALL
SAVE_ARGS
SAVE_REST
.endm
.macro RESTORE_ALL addskip=0
RESTORE_REST
RESTORE_ARGS 0,\addskip
.endm
.macro icebp
.byte 0xf1
.endm
#ifdef CONFIG_FRAME_POINTER
#define ENTER enter
#define LEAVE leave
#else
#define ENTER
#define LEAVE
#endif
|
