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Commit | Line | Data |
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1 | /* | |
2 | * Some macros to handle stack frames in assembly. | |
3 | */ | |
4 | ||
5 | ||
6 | #define R15 0 | |
7 | #define R14 8 | |
8 | #define R13 16 | |
9 | #define R12 24 | |
10 | #define RBP 32 | |
11 | #define RBX 40 | |
12 | /* arguments: interrupts/non tracing syscalls only save upto here*/ | |
13 | #define R11 48 | |
14 | #define R10 56 | |
15 | #define R9 64 | |
16 | #define R8 72 | |
17 | #define RAX 80 | |
18 | #define RCX 88 | |
19 | #define RDX 96 | |
20 | #define RSI 104 | |
21 | #define RDI 112 | |
22 | #define ORIG_RAX 120 /* + error_code */ | |
23 | /* end of arguments */ | |
24 | /* cpu exception frame or undefined in case of fast syscall. */ | |
25 | #define RIP 128 | |
26 | #define CS 136 | |
27 | #define EFLAGS 144 | |
28 | #define RSP 152 | |
29 | #define SS 160 | |
30 | #define ARGOFFSET R11 | |
31 | #define SWFRAME ORIG_RAX | |
32 | ||
33 | .macro SAVE_ARGS addskip=0,norcx=0,nor891011=0 | |
34 | subq $9*8+\addskip,%rsp | |
35 | CFI_ADJUST_CFA_OFFSET 9*8+\addskip | |
36 | movq %rdi,8*8(%rsp) | |
37 | CFI_REL_OFFSET rdi,8*8 | |
38 | movq %rsi,7*8(%rsp) | |
39 | CFI_REL_OFFSET rsi,7*8 | |
40 | movq %rdx,6*8(%rsp) | |
41 | CFI_REL_OFFSET rdx,6*8 | |
42 | .if \norcx | |
43 | .else | |
44 | movq %rcx,5*8(%rsp) | |
45 | CFI_REL_OFFSET rcx,5*8 | |
46 | .endif | |
47 | movq %rax,4*8(%rsp) | |
48 | CFI_REL_OFFSET rax,4*8 | |
49 | .if \nor891011 | |
50 | .else | |
51 | movq %r8,3*8(%rsp) | |
52 | CFI_REL_OFFSET r8,3*8 | |
53 | movq %r9,2*8(%rsp) | |
54 | CFI_REL_OFFSET r9,2*8 | |
55 | movq %r10,1*8(%rsp) | |
56 | CFI_REL_OFFSET r10,1*8 | |
57 | movq %r11,(%rsp) | |
58 | CFI_REL_OFFSET r11,0*8 | |
59 | .endif | |
60 | .endm | |
61 | ||
62 | #define ARG_SKIP 9*8 | |
63 | .macro RESTORE_ARGS skiprax=0,addskip=0,skiprcx=0,skipr11=0,skipr8910=0,skiprdx=0 | |
64 | .if \skipr11 | |
65 | .else | |
66 | movq (%rsp),%r11 | |
67 | CFI_RESTORE r11 | |
68 | .endif | |
69 | .if \skipr8910 | |
70 | .else | |
71 | movq 1*8(%rsp),%r10 | |
72 | CFI_RESTORE r10 | |
73 | movq 2*8(%rsp),%r9 | |
74 | CFI_RESTORE r9 | |
75 | movq 3*8(%rsp),%r8 | |
76 | CFI_RESTORE r8 | |
77 | .endif | |
78 | .if \skiprax | |
79 | .else | |
80 | movq 4*8(%rsp),%rax | |
81 | CFI_RESTORE rax | |
82 | .endif | |
83 | .if \skiprcx | |
84 | .else | |
85 | movq 5*8(%rsp),%rcx | |
86 | CFI_RESTORE rcx | |
87 | .endif | |
88 | .if \skiprdx | |
89 | .else | |
90 | movq 6*8(%rsp),%rdx | |
91 | CFI_RESTORE rdx | |
92 | .endif | |
93 | movq 7*8(%rsp),%rsi | |
94 | CFI_RESTORE rsi | |
95 | movq 8*8(%rsp),%rdi | |
96 | CFI_RESTORE rdi | |
97 | .if ARG_SKIP+\addskip > 0 | |
98 | addq $ARG_SKIP+\addskip,%rsp | |
99 | CFI_ADJUST_CFA_OFFSET -(ARG_SKIP+\addskip) | |
100 | .endif | |
101 | .endm | |
102 | ||
103 | .macro LOAD_ARGS offset | |
104 | movq \offset(%rsp),%r11 | |
105 | movq \offset+8(%rsp),%r10 | |
106 | movq \offset+16(%rsp),%r9 | |
107 | movq \offset+24(%rsp),%r8 | |
108 | movq \offset+40(%rsp),%rcx | |
109 | movq \offset+48(%rsp),%rdx | |
110 | movq \offset+56(%rsp),%rsi | |
111 | movq \offset+64(%rsp),%rdi | |
112 | movq \offset+72(%rsp),%rax | |
113 | .endm | |
114 | ||
115 | #define REST_SKIP 6*8 | |
116 | .macro SAVE_REST | |
117 | subq $REST_SKIP,%rsp | |
118 | CFI_ADJUST_CFA_OFFSET REST_SKIP | |
119 | movq %rbx,5*8(%rsp) | |
120 | CFI_REL_OFFSET rbx,5*8 | |
121 | movq %rbp,4*8(%rsp) | |
122 | CFI_REL_OFFSET rbp,4*8 | |
123 | movq %r12,3*8(%rsp) | |
124 | CFI_REL_OFFSET r12,3*8 | |
125 | movq %r13,2*8(%rsp) | |
126 | CFI_REL_OFFSET r13,2*8 | |
127 | movq %r14,1*8(%rsp) | |
128 | CFI_REL_OFFSET r14,1*8 | |
129 | movq %r15,(%rsp) | |
130 | CFI_REL_OFFSET r15,0*8 | |
131 | .endm | |
132 | ||
133 | .macro RESTORE_REST | |
134 | movq (%rsp),%r15 | |
135 | CFI_RESTORE r15 | |
136 | movq 1*8(%rsp),%r14 | |
137 | CFI_RESTORE r14 | |
138 | movq 2*8(%rsp),%r13 | |
139 | CFI_RESTORE r13 | |
140 | movq 3*8(%rsp),%r12 | |
141 | CFI_RESTORE r12 | |
142 | movq 4*8(%rsp),%rbp | |
143 | CFI_RESTORE rbp | |
144 | movq 5*8(%rsp),%rbx | |
145 | CFI_RESTORE rbx | |
146 | addq $REST_SKIP,%rsp | |
147 | CFI_ADJUST_CFA_OFFSET -(REST_SKIP) | |
148 | .endm | |
149 | ||
150 | .macro SAVE_ALL | |
151 | SAVE_ARGS | |
152 | SAVE_REST | |
153 | .endm | |
154 | ||
155 | .macro RESTORE_ALL addskip=0 | |
156 | RESTORE_REST | |
157 | RESTORE_ARGS 0,\addskip | |
158 | .endm | |
159 | ||
160 | .macro icebp | |
161 | .byte 0xf1 | |
162 | .endm |