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
|
#include "dlfcn.h"
#define INCL_BASE
#include <os2.h>
static ULONG retcode;
static char fail[300];
void *
dlopen(char *path, int mode)
{
HMODULE handle;
char tmp[260], *beg, *dot;
ULONG rc;
fail[0] = 0;
if ((rc = DosLoadModule(fail, sizeof fail, path, &handle)) == 0)
return (void *)handle;
retcode = rc;
/* Not found. Check for non-FAT name and try truncated name. */
/* Don't know if this helps though... */
for (beg = dot = path + strlen(path);
beg > path && !strchr(":/\\", *(beg-1));
beg--)
if (*beg == '.')
dot = beg;
if (dot - beg > 8) {
int n = beg+8-path;
memmove(tmp, path, n);
memmove(tmp+n, dot, strlen(dot)+1);
if (DosLoadModule(fail, sizeof fail, tmp, &handle) == 0)
return (void *)handle;
}
return NULL;
}
void *
dlsym(void *handle, char *symbol)
{
ULONG rc, type;
PFN addr;
fail[0] = 0;
rc = DosQueryProcAddr((HMODULE)handle, 0, symbol, &addr);
if (rc == 0) {
rc = DosQueryProcType((HMODULE)handle, 0, symbol, &type);
if (rc == 0 && type == PT_32BIT)
return (void *)addr;
rc = ERROR_CALL_NOT_IMPLEMENTED;
}
retcode = rc;
return NULL;
}
char *
dlerror(void)
{
static char buf[700];
ULONG len;
if (retcode == 0)
return NULL;
if (DosGetMessage(NULL, 0, buf, sizeof buf - 1, retcode,
"OSO001.MSG", &len)) {
if (fail[0])
sprintf(buf,
"OS/2 system error code %d, possible problematic module: '%s'",
retcode, fail);
else
sprintf(buf, "OS/2 system error code %d", retcode);
} else {
buf[len] = '\0';
if (len && buf[len - 1] == '\n')
buf[--len] = 0;
if (len && buf[len - 1] == '\r')
buf[--len] = 0;
if (len && buf[len - 1] == '.')
buf[--len] = 0;
if (fail[0] && len < 300)
sprintf(buf + len, ", possible problematic module: '%s'",
fail);
}
retcode = 0;
return buf;
}
|
