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
157
158
159
160
161
162
163
164
165
166
167
168
169
|
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "a.h"
/*
* Helpers for building runtime.
*/
// mkzversion writes zversion.go:
//
// package runtime
// const defaultGoroot = <goroot>
// const theVersion = <version>
//
void
mkzversion(char *dir, char *file)
{
Buf b, out;
USED(dir);
binit(&b);
binit(&out);
bwritestr(&out, bprintf(&b,
"// auto generated by go tool dist\n"
"\n"
"package runtime\n"
"\n"
"const defaultGoroot = `%s`\n"
"const theVersion = `%s`\n"
"var buildVersion = theVersion\n", goroot_final, goversion));
writefile(&out, file, 0);
bfree(&b);
bfree(&out);
}
// mkzexperiment writes zaexperiment.h (sic):
//
// #define GOEXPERIMENT "experiment string"
//
void
mkzexperiment(char *dir, char *file)
{
Buf b, out, exp;
USED(dir);
binit(&b);
binit(&out);
binit(&exp);
xgetenv(&exp, "GOEXPERIMENT");
bwritestr(&out, bprintf(&b,
"// auto generated by go tool dist\n"
"\n"
"#define GOEXPERIMENT \"%s\"\n", bstr(&exp)));
writefile(&out, file, 0);
bfree(&b);
bfree(&out);
bfree(&exp);
}
// mkzgoarch writes zgoarch_$GOARCH.go:
//
// package runtime
// const theGoarch = <goarch>
//
void
mkzgoarch(char *dir, char *file)
{
Buf b, out;
USED(dir);
binit(&b);
binit(&out);
bwritestr(&out, bprintf(&b,
"// auto generated by go tool dist\n"
"\n"
"package runtime\n"
"\n"
"const theGoarch = `%s`\n", goarch));
writefile(&out, file, 0);
bfree(&b);
bfree(&out);
}
// mkzgoos writes zgoos_$GOOS.go:
//
// package runtime
// const theGoos = <goos>
//
void
mkzgoos(char *dir, char *file)
{
Buf b, out;
USED(dir);
binit(&b);
binit(&out);
bwritestr(&out, "// auto generated by go tool dist\n\n");
if(streq(goos, "linux")) {
bwritestr(&out, "// +build !android\n\n");
}
bwritestr(&out, bprintf(&b,
"package runtime\n"
"\n"
"const theGoos = `%s`\n", goos));
writefile(&out, file, 0);
bfree(&b);
bfree(&out);
}
#define MAXWINCB 2000 /* maximum number of windows callbacks allowed */
// mkzsys writes zsys_$GOOS_$GOARCH.s,
// which contains arch or os specific asm code.
//
void
mkzsys(char *dir, char *file)
{
int i;
Buf out;
USED(dir);
binit(&out);
bwritestr(&out, "// auto generated by go tool dist\n\n");
if(streq(goos, "linux")) {
bwritestr(&out, "// +build !android\n\n");
}
if(streq(goos, "windows")) {
bwritef(&out,
"// runtime·callbackasm is called by external code to\n"
"// execute Go implemented callback function. It is not\n"
"// called from the start, instead runtime·compilecallback\n"
"// always returns address into runtime·callbackasm offset\n"
"// appropriately so different callbacks start with different\n"
"// CALL instruction in runtime·callbackasm. This determines\n"
"// which Go callback function is executed later on.\n"
"TEXT runtime·callbackasm(SB),7,$0\n");
for(i=0; i<MAXWINCB; i++) {
bwritef(&out, "\tCALL\truntime·callbackasm1(SB)\n");
}
bwritef(&out, "\tRET\n");
}
writefile(&out, file, 0);
bfree(&out);
}
|
