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
|
#define _BSD_SOURCE
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include "psxglue.h"
#include "pthread_impl.h"
extern const struct __ldso_vtbl * __ldso_vtbl;
extern const struct __psx_vtbl * __psx_vtbl;
static pthread_rwlock_t __ldso_lock;
void * dlopen(const char * file, int mode)
{
int status;
void * base;
int cs;
char * ch;
char * next;
char * epath;
char * lpath;
const char ** lpathv;
const char ** epathv;
char lpathbuf[2048];
const char * lpathvbuf[64];
int i;
/* prolog */
if (!file)
return __ldso_vtbl->dlopen(0,mode,0,&status);
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
pthread_rwlock_wrlock(&__ldso_lock);
__inhibit_ptc();
/* loader path environment variable to loader path vector */
if ((epath = getenv("LD_LIBRARY_PATH"))) {
lpath = (strncpy(lpathbuf,epath,2048) < &lpathbuf[2048])
? lpathbuf
: strdup(epath);
if ((i = !!lpath))
for (ch=lpath; *ch; ch++)
if (*ch == ':')
i++;
lpathv = (++i < 64)
? lpathvbuf
: calloc(++i,sizeof(char *));
} else {
lpath = lpathbuf;
lpathv = lpathvbuf;
lpath[0] = 0;
}
if (lpath && lpathv) {
ch = lpath;
next = *ch ? ch : 0;
epathv = lpathv;
for (; next; ) {
*epathv++ = (*next == ':')
? "."
: next;
ch = &next[1];
for (; *ch; ) {
if (*ch == ':') {
*ch = 0;
ch = 0;
} else {
ch++;
}
}
next = *ch ? ch : 0;
}
*epathv = 0;
}
/* dlopen */
base = (lpath && lpathv)
? __ldso_vtbl->dlopen(file,mode,lpathv,&status)
: 0;
/* epilog */
if (lpath && (lpath != lpathbuf))
free(lpath);
if (lpathv && (lpathv != lpathvbuf))
free(lpathv);
__release_ptc();
pthread_rwlock_unlock(&__ldso_lock);
if (base)
__psx_vtbl->do_global_ctors_fn();
pthread_setcancelstate(cs, 0);
return base;
}
int __dladdr(const void * addr, Dl_info * info)
{
return __ldso_vtbl->dladdr(addr,info);
}
int __dlinfo(void * dso, int req, void * res)
{
return (__ldso_vtbl->dlinfo(dso,req,res)) ? -1 : 0;
}
void *__dlsym(void * restrict p, const char * restrict s)
{
return __ldso_vtbl->dlsym(p,s,0);
}
int dlclose(void *p)
{
return __ldso_vtbl->dlclose(p);
}
char * dlerror(void)
{
return __ldso_vtbl->dlerror();
}
weak_alias(__dlsym,dlsym);
weak_alias(__dladdr,dladdr);
weak_alias(__dlinfo,dlinfo);
|
