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uclibc: Add support for $ORIGIN 

This is required by systemd

(From OE-Core rev: 08ad271248cc2c7cd9cfbe683d2335337f5ebb8b)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Khem Raj 2011-06-21 16:01:15 -07:00 committed by Richard Purdie
parent 42e6094598
commit 7c8e4f1cea
3 changed files with 401 additions and 1 deletions
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183
meta/recipes-core/uclibc/uclibc-git/orign_path.patch Normal file
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@ -0,0 +1,183 @@
Patch is backported from
http://lists.busybox.net/pipermail/uclibc/2011-March/045003.html
Upstream-Status: Pending
diff --git a/ldso/ldso/dl-elf.c b/ldso/ldso/dl-elf.c
index 505247e..2b2d429 100644
--- a/ldso/ldso/dl-elf.c
+++ b/ldso/ldso/dl-elf.c
@@ -133,53 +133,60 @@ _dl_protect_relro (struct elf_resolve *l)
* in uClibc/ldso/util/ldd.c */
static struct elf_resolve *
search_for_named_library(const char *name, int secure, 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;
- }
- 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);
- if ((tpnt = _dl_load_elf_shared_library(secure, rpnt, mylibname)) != NULL)
- return tpnt;
- path_n = path+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 (secure && 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, ".");
}
- path++;
- } while (!done);
+ _dl_strcat(mylibname, "/");
+ _dl_strcat(mylibname, name);
+
+ tpnt = _dl_load_elf_shared_library(secure, rpnt, mylibname);
+ if (tpnt != NULL)
+ return tpnt;
+ }
+
return NULL;
}
@@ -231,7 +238,8 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
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, secure, pnt, rpnt)) != NULL)
+ if ((tpnt1 = search_for_named_library(libname, secure, pnt, rpnt,
+ tpnt->libname)) != NULL)
return tpnt1;
}
#endif
@@ -239,7 +247,7 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
/* 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, secure, _dl_library_path, rpnt)) != NULL)
+ if ((tpnt1 = search_for_named_library(libname, secure, _dl_library_path, rpnt, NULL)) != NULL)
{
return tpnt1;
}
@@ -253,7 +261,7 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
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, secure, pnt, rpnt)) != NULL)
+ if ((tpnt1 = search_for_named_library(libname, secure, pnt, rpnt, NULL)) != NULL)
return tpnt1;
}
#endif
@@ -287,7 +295,7 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
/* 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, secure, _dl_ldsopath, rpnt);
+ tpnt1 = search_for_named_library(libname, secure, _dl_ldsopath, rpnt, NULL);
if (tpnt1 != NULL)
return tpnt1;
@@ -300,7 +308,7 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
#ifndef __LDSO_CACHE_SUPPORT__
":" UCLIBC_RUNTIME_PREFIX "usr/X11R6/lib"
#endif
- , rpnt);
+ , rpnt, NULL);
if (tpnt1 != NULL)
return tpnt1;
diff --git a/ldso/ldso/ldso.c b/ldso/ldso/ldso.c
index 7ee9257..9423670 100644
--- a/ldso/ldso/ldso.c
+++ b/ldso/ldso/ldso.c
@@ -272,6 +272,20 @@ static void __attribute__ ((destructor)) __attribute_used__ _dl_fini(void)
}
}
+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
@@ -321,9 +335,7 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
* 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]);
if (_start == (void *) auxvt[AT_ENTRY].a_un.a_val) {
_dl_dprintf(_dl_debug_file, "Standalone execution is not supported yet\n");

215
meta/recipes-core/uclibc/uclibc-git/rtld_no.patch Normal file
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@ -0,0 +1,215 @@
Patch is backported from
http://lists.busybox.net/pipermail/uclibc/2011-March/045004.html
Upstream-Status: Pending
diff --git a/ldso/include/dl-elf.h b/ldso/include/dl-elf.h
index 7fbb373..7102351 100644
--- a/ldso/include/dl-elf.h
+++ b/ldso/include/dl-elf.h
@@ -25,16 +25,18 @@ static __inline__ void _dl_map_cache(void) { }
static __inline__ void _dl_unmap_cache(void) { }
#endif
+#define DL_RESOLVE_SECURE 0x0001
+#define DL_RESOLVE_NOLOAD 0x0002
/* Function prototypes for non-static stuff in readelflib1.c */
extern void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt,
unsigned long rel_addr, unsigned long rel_size);
extern int _dl_parse_relocation_information(struct dyn_elf *rpnt,
unsigned long rel_addr, unsigned long rel_size);
-extern struct elf_resolve * _dl_load_shared_library(int secure,
+extern struct elf_resolve * _dl_load_shared_library(int resolve_flags,
struct dyn_elf **rpnt, struct elf_resolve *tpnt, char *full_libname,
int trace_loaded_objects);
-extern struct elf_resolve * _dl_load_elf_shared_library(int secure,
+extern struct elf_resolve * _dl_load_elf_shared_library(int resolve_flags,
struct dyn_elf **rpnt, char *libname);
extern struct elf_resolve *_dl_check_if_named_library_is_loaded(const char *full_libname,
int trace_loaded_objects);
diff --git a/ldso/ldso/dl-elf.c b/ldso/ldso/dl-elf.c
index 2b2d429..6d35bf2 100644
--- a/ldso/ldso/dl-elf.c
+++ b/ldso/ldso/dl-elf.c
@@ -132,7 +132,7 @@ _dl_protect_relro (struct elf_resolve *l)
/* This function's behavior must exactly match that
* in uClibc/ldso/util/ldd.c */
static struct elf_resolve *
-search_for_named_library(const char *name, int secure, const char *path_list,
+search_for_named_library(const char *name, int resolve_flags, const char *path_list,
struct dyn_elf **rpnt, const char *origin)
{
char *mylibname;
@@ -162,7 +162,7 @@ search_for_named_library(const char *name, int secure, const char *path_list,
if (plen >= 7 && _dl_memcmp(p, "$ORIGIN", 7) == 0) {
int olen;
- if (secure && plen != 7)
+ if ((resolve_flags & DL_RESOLVE_SECURE) && plen != 7)
continue;
if (origin == NULL)
continue;
@@ -182,7 +182,7 @@ search_for_named_library(const char *name, int secure, const char *path_list,
_dl_strcat(mylibname, "/");
_dl_strcat(mylibname, name);
- tpnt = _dl_load_elf_shared_library(secure, rpnt, mylibname);
+ tpnt = _dl_load_elf_shared_library(resolve_flags, rpnt, mylibname);
if (tpnt != NULL)
return tpnt;
}
@@ -194,7 +194,7 @@ search_for_named_library(const char *name, int secure, const char *path_list,
unsigned long _dl_error_number;
unsigned long _dl_internal_error_number;
-struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
+struct elf_resolve *_dl_load_shared_library(int resolve_flags, struct dyn_elf **rpnt,
struct elf_resolve *tpnt, char *full_libname, int attribute_unused trace_loaded_objects)
{
char *pnt;
@@ -223,7 +223,7 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
if (libname != full_libname) {
_dl_if_debug_dprint("\ttrying file='%s'\n", full_libname);
- tpnt1 = _dl_load_elf_shared_library(secure, rpnt, full_libname);
+ tpnt1 = _dl_load_elf_shared_library(resolve_flags, rpnt, full_libname);
if (tpnt1) {
return tpnt1;
}
@@ -238,7 +238,7 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
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, secure, pnt, rpnt,
+ if ((tpnt1 = search_for_named_library(libname, resolve_flags, pnt, rpnt,
tpnt->libname)) != NULL)
return tpnt1;
}
@@ -247,7 +247,7 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
/* 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, secure, _dl_library_path, rpnt, NULL)) != NULL)
+ if ((tpnt1 = search_for_named_library(libname, resolve_flags, _dl_library_path, rpnt, NULL)) != NULL)
{
return tpnt1;
}
@@ -261,7 +261,7 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
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, secure, pnt, rpnt, NULL)) != NULL)
+ if ((tpnt1 = search_for_named_library(libname, resolve_flags, pnt, rpnt, NULL)) != NULL)
return tpnt1;
}
#endif
@@ -284,7 +284,7 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
|| libent[i].flags == LIB_ELF_LIBC0
|| libent[i].flags == LIB_ELF_LIBC5)
&& _dl_strcmp(libname, strs + libent[i].sooffset) == 0
- && (tpnt1 = _dl_load_elf_shared_library(secure, rpnt, strs + libent[i].liboffset))
+ && (tpnt1 = _dl_load_elf_shared_library(resolve_flags, rpnt, strs + libent[i].liboffset))
) {
return tpnt1;
}
@@ -295,14 +295,14 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
/* 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, secure, _dl_ldsopath, rpnt, NULL);
+ tpnt1 = search_for_named_library(libname, resolve_flags, _dl_ldsopath, rpnt, NULL);
if (tpnt1 != NULL)
return tpnt1;
/* Lastly, search the standard list of paths for the library.
This list must exactly match the list in uClibc/ldso/util/ldd.c */
_dl_if_debug_dprint("\tsearching full lib path list\n");
- tpnt1 = search_for_named_library(libname, secure,
+ tpnt1 = search_for_named_library(libname, resolve_flags,
UCLIBC_RUNTIME_PREFIX "lib:"
UCLIBC_RUNTIME_PREFIX "usr/lib"
#ifndef __LDSO_CACHE_SUPPORT__
@@ -329,7 +329,7 @@ goof:
* are required.
*/
-struct elf_resolve *_dl_load_elf_shared_library(int secure,
+struct elf_resolve *_dl_load_elf_shared_library(int resolve_flags,
struct dyn_elf **rpnt, char *libname)
{
ElfW(Ehdr) *epnt;
@@ -368,7 +368,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
}
/* If we are in secure mode (i.e. a setu/gid binary using LD_PRELOAD),
we don't load the library if it isn't setuid. */
- if (secure) {
+ if (resolve_flags & DL_RESOLVE_SECURE) {
if (!(st.st_mode & S_ISUID)) {
_dl_close(infile);
return NULL;
@@ -384,6 +384,10 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure,
return tpnt;
}
}
+ if (resolve_flags & DL_RESOLVE_NOLOAD) {
+ _dl_close(infile);
+ return NULL;
+ }
header = _dl_mmap((void *) 0, _dl_pagesize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_UNINITIALIZE, -1, 0);
if (_dl_mmap_check_error(header)) {
diff --git a/ldso/ldso/ldso.c b/ldso/ldso/ldso.c
index 9423670..b71af34 100644
--- a/ldso/ldso/ldso.c
+++ b/ldso/ldso/ldso.c
@@ -646,7 +646,9 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
if (!_dl_secure || _dl_strchr(str, '/') == NULL) {
_dl_if_debug_dprint("\tfile='%s'; needed by '%s'\n", str, _dl_progname);
- tpnt1 = _dl_load_shared_library(_dl_secure, &rpnt, NULL, str, trace_loaded_objects);
+ tpnt1 = _dl_load_shared_library(
+ _dl_secure ? DL_RESOLVE_SECURE : 0,
+ &rpnt, NULL, str, trace_loaded_objects);
if (!tpnt1) {
#ifdef __LDSO_LDD_SUPPORT__
if (trace_loaded_objects)
diff --git a/ldso/libdl/libdl.c b/ldso/libdl/libdl.c
index 68cd579..edf38d2 100644
--- a/ldso/libdl/libdl.c
+++ b/ldso/libdl/libdl.c
@@ -288,7 +288,7 @@ void *dlopen(const char *libname, int flag)
#endif
/* A bit of sanity checking... */
- if (!(flag & (RTLD_LAZY|RTLD_NOW))) {
+ if (!(flag & (RTLD_LAZY|RTLD_NOW|RTLD_NOLOAD))) {
_dl_error_number = LD_BAD_HANDLE;
return NULL;
}
@@ -358,8 +358,9 @@ void *dlopen(const char *libname, int flag)
/* Try to load the specified library */
_dl_if_debug_print("Trying to dlopen '%s', RTLD_GLOBAL:%d RTLD_NOW:%d\n",
(char*)libname, (flag & RTLD_GLOBAL ? 1:0), (now_flag & RTLD_NOW ? 1:0));
- tpnt = _dl_load_shared_library(0, &rpnt, tfrom, (char*)libname, 0);
+ tpnt = _dl_load_shared_library((flag & RTLD_NOLOAD) ? DL_RESOLVE_NOLOAD : 0,
+ &rpnt, tfrom, (char*)libname, 0);
if (tpnt == NULL) {
_dl_unmap_cache();
return NULL;
diff --git a/libc/sysdeps/linux/common/bits/dlfcn.h b/libc/sysdeps/linux/common/bits/dlfcn.h
index 4bfbbff..47b42ad 100644
--- a/libc/sysdeps/linux/common/bits/dlfcn.h
+++ b/libc/sysdeps/linux/common/bits/dlfcn.h
@@ -24,9 +24,9 @@
/* The MODE argument to `dlopen' contains one of the following: */
#define RTLD_LAZY 0x00001 /* Lazy function call binding. */
#define RTLD_NOW 0x00002 /* Immediate function call binding. */
-#if 0 /* uClibc doesnt support these */
-#define RTLD_BINDING_MASK 0x3 /* Mask of binding time value. */
+#define RTLD_BINDING_MASK 0x3 /* Mask of binding time value. */
#define RTLD_NOLOAD 0x00004 /* Do not load the object. */
+#if 0 /* uClibc doesnt support these */
#define RTLD_DEEPBIND 0x00008 /* Use deep binding. */
#endif

4
meta/recipes-core/uclibc/uclibc_git.bb
View File

@ -2,7 +2,7 @@ SRCREV="71d63ed75648da9b0b71afabb9c60aaad792c55c"
require uclibc.inc
PV = "0.9.31+0.9.32rc3"
PR = "${INC_PR}.3"
PR = "${INC_PR}.4"
PROVIDES += "virtual/${TARGET_PREFIX}libc-for-gcc"
FILESPATH = "${@base_set_filespath([ '${FILE_DIRNAME}/uclibc-git' ], d)}"
@ -27,5 +27,7 @@ SRC_URI = "git://uclibc.org/uClibc.git;branch=master;protocol=git \
file://append_UCLIBC_EXTRA_CFLAGS.patch \
file://compile-arm-fork-with-O2.patch \
file://epoll-asm-fix.patch \
file://orign_path.patch \
file://rtld_no.patch \
"
S = "${WORKDIR}/git"