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
|
/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
.text
.align 2
.global invokeNative
.type invokeNative,function
/*
* Arguments passed in:
*
* a2 function pntr
* a3 argv
* a4 argc
*/
invokeNative:
entry a1, 256
blti a4, 1, return /* at least one argument required: exec_env */
/* register a10 ~ a15 are used to pass first 6 arguments */
l32i.n a10, a3, 0
beqi a4, 1, call_func
l32i.n a11, a3, 4
beqi a4, 2, call_func
l32i.n a12, a3, 8
beqi a4, 3, call_func
l32i.n a13, a3, 12
beqi a4, 4, call_func
l32i.n a14, a3, 16
beqi a4, 5, call_func
l32i.n a15, a3, 20
beqi a4, 6, call_func
/* left arguments are passed through stack */
addi a4, a4, -6
addi a3, a3, 24 /* move argv pointer */
mov.n a6, a1 /* store stack pointer */
addi a7, a1, 256 /* stack boundary */
loop_args:
beqi a4, 0, call_func
bge a6, a7, call_func /* reach stack boundary */
l32i.n a5, a3, 0 /* load argument to a5 */
s32i.n a5, a6, 0 /* push data to stack */
addi a4, a4, -1 /* decrease argc */
addi a3, a3, 4 /* move argv pointer */
addi a6, a6, 4 /* move stack pointer */
j loop_args
call_func:
mov.n a8, a2
callx8 a8
/* the result returned from callee is stored in a2
mov the result to a10 so the caller of this function
can receive the value */
mov.n a2, a10
mov.n a3, a11
return:
retw.n
|
