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
170
171
172
173
174
175
176
177
|
diff -Nur uClibc-git/ldso/ldso/dl-elf.c uClibc-origin/ldso/ldso/dl-elf.c
--- uClibc-git/ldso/ldso/dl-elf.c 2014-02-03 12:32:56.000000000 +0100
+++ uClibc-origin/ldso/ldso/dl-elf.c 2014-02-17 14:44:13.000000000 +0100
@@ -133,56 +133,59 @@
* in uClibc/ldso/util/ldd.c */
static struct elf_resolve *
search_for_named_library(const char *name, unsigned rflags, const char *path_list,
- struct dyn_elf **rpnt)
+ struct dyn_elf **rpnt, const char *origin)
{
- char *path, *path_n, *mylibname;
+ char *mylibname;
+ const char *p, *pn;
struct elf_resolve *tpnt;
- int done;
+ int plen;
if (path_list==NULL)
return NULL;
- /* We need a writable copy of this string, but we don't
- * need this allocated permanently since we don't want
- * to leak memory, so use alloca to put path on the stack */
- done = _dl_strlen(path_list);
- path = alloca(done + 1);
-
/* another bit of local storage */
mylibname = alloca(2050);
- _dl_memcpy(path, path_list, done+1);
-
/* Unlike ldd.c, don't bother to eliminate double //s */
/* Replace colons with zeros in path_list */
/* : at the beginning or end of path maps to CWD */
/* :: anywhere maps CWD */
/* "" maps to CWD */
- done = 0;
- path_n = path;
- do {
- if (*path == 0) {
- *path = ':';
- done = 1;
+ for (p = path_list; p != NULL; p = pn) {
+ pn = _dl_strchr(p + 1, ':');
+ if (pn != NULL) {
+ plen = pn - p;
+ pn++;
+ } else
+ plen = _dl_strlen(p);
+
+ if (plen >= 7 && _dl_memcmp(p, "$ORIGIN", 7) == 0) {
+ int olen;
+ if (rflags && plen != 7)
+ continue;
+ if (origin == NULL)
+ continue;
+ for (olen = _dl_strlen(origin) - 1; olen >= 0 && origin[olen] != '/'; olen--)
+ ;
+ if (olen <= 0)
+ continue;
+ _dl_memcpy(&mylibname[0], origin, olen);
+ _dl_memcpy(&mylibname[olen], p + 7, plen - 7);
+ mylibname[olen + plen - 7] = 0;
+ } else if (plen != 0) {
+ _dl_memcpy(mylibname, p, plen);
+ mylibname[plen] = 0;
+ } else {
+ _dl_strcpy(mylibname, ".");
}
- if (*path == ':') {
- *path = 0;
- if (*path_n)
- _dl_strcpy(mylibname, path_n);
- else
- _dl_strcpy(mylibname, "."); /* Assume current dir if empty path */
- _dl_strcat(mylibname, "/");
- _dl_strcat(mylibname, name);
-#ifdef __LDSO_SAFE_RUNPATH__
- if (*mylibname == '/')
-#endif
- if ((tpnt = _dl_load_elf_shared_library(rflags, rpnt, mylibname)) != NULL)
- return tpnt;
- path_n = path+1;
- }
- path++;
- } while (!done);
+ _dl_strcat(mylibname, "/");
+ _dl_strcat(mylibname, name);
+
+ tpnt = _dl_load_elf_shared_library(rflags, rpnt, mylibname);
+ if (tpnt != NULL)
+ return tpnt;
+ }
return NULL;
}
@@ -234,7 +237,7 @@
if (pnt) {
pnt += (unsigned long) tpnt->dynamic_info[DT_STRTAB];
_dl_if_debug_dprint("\tsearching RPATH='%s'\n", pnt);
- if ((tpnt1 = search_for_named_library(libname, rflags, pnt, rpnt)) != NULL)
+ if ((tpnt1 = search_for_named_library(libname, rflags, pnt, rpnt, tpnt->libname)) != NULL)
return tpnt1;
}
#endif
@@ -243,7 +246,7 @@
/* Check in LD_{ELF_}LIBRARY_PATH, if specified and allowed */
if (_dl_library_path) {
_dl_if_debug_dprint("\tsearching LD_LIBRARY_PATH='%s'\n", _dl_library_path);
- if ((tpnt1 = search_for_named_library(libname, rflags, _dl_library_path, rpnt)) != NULL)
+ if ((tpnt1 = search_for_named_library(libname, rflags, _dl_library_path, rpnt, NULL)) != NULL)
{
return tpnt1;
}
@@ -257,7 +260,7 @@
if (pnt) {
pnt += (unsigned long) tpnt->dynamic_info[DT_STRTAB];
_dl_if_debug_dprint("\tsearching RUNPATH='%s'\n", pnt);
- if ((tpnt1 = search_for_named_library(libname, rflags, pnt, rpnt)) != NULL)
+ if ((tpnt1 = search_for_named_library(libname, rflags, pnt, rpnt, NULL)) != NULL)
return tpnt1;
}
#endif
@@ -291,7 +294,7 @@
/* Look for libraries wherever the shared library loader
* was installed */
_dl_if_debug_dprint("\tsearching ldso dir='%s'\n", _dl_ldsopath);
- tpnt1 = search_for_named_library(libname, rflags, _dl_ldsopath, rpnt);
+ tpnt1 = search_for_named_library(libname, rflags, _dl_ldsopath, rpnt, NULL);
if (tpnt1 != NULL)
return tpnt1;
#endif
@@ -304,7 +307,7 @@
#ifndef __LDSO_CACHE_SUPPORT__
":" UCLIBC_RUNTIME_PREFIX "usr/X11R6/lib"
#endif
- , rpnt);
+ , rpnt, NULL);
if (tpnt1 != NULL)
return tpnt1;
diff -Nur uClibc-git/ldso/ldso/ldso.c uClibc-origin/ldso/ldso/ldso.c
--- uClibc-git/ldso/ldso/ldso.c 2014-02-03 12:32:56.000000000 +0100
+++ uClibc-origin/ldso/ldso/ldso.c 2014-02-17 12:34:00.000000000 +0100
@@ -403,6 +403,20 @@
return p - list;
}
+static void _dl_setup_progname(const char *argv0)
+{
+ char image[PATH_MAX];
+ ssize_t s;
+
+ s = _dl_readlink("/proc/self/exe", image, sizeof(image));
+ if (s > 0 && image[0] == '/') {
+ image[s] = 0;
+ _dl_progname = _dl_strdup(image);
+ } else if (argv0) {
+ _dl_progname = argv0;
+ }
+}
+
void *_dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
ElfW(auxv_t) auxvt[AT_EGID + 1], char **envp, char **argv
DL_GET_READY_TO_RUN_EXTRA_PARMS)
@@ -454,9 +468,7 @@
* been fixed up by now. Still no function calls outside of this
* library, since the dynamic resolver is not yet ready.
*/
- if (argv[0]) {
- _dl_progname = argv[0];
- }
+ _dl_setup_progname(argv[0]);
#ifdef __DSBT__
_dl_ldso_dsbt = (void *)tpnt->dynamic_info[DT_DSBT_BASE_IDX];
|
