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elf: remove redundant is_path argument

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is_path argument is no longer used and could be safely removed.

* elf/dl-dst.h (DL_DST_COUNT): Remove is_path argument, all callers
updated.
* elf/dl-load.c (is_dst, _dl_dst_count, _dl_dst_substitute,
expand_dynamic_string_token): Likewise.
* sysdeps/generic/ldsodefs.h (_dl_dst_count, _dl_dst_substitute): Remove
is_path argument.
This commit is contained in:
Dmitry V. Levin 2017-12-20 11:27:51 +00:00
parent 1c36e1e6a5
commit 2bd86632b7
5 changed files with 27 additions and 24 deletions
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7
ChangeLog
View File

@ -1,5 +1,12 @@
2017-12-27 Dmitry V. Levin <ldv@altlinux.org>
* elf/dl-dst.h (DL_DST_COUNT): Remove is_path argument, all callers
updated.
* elf/dl-load.c (is_dst, _dl_dst_count, _dl_dst_substitute,
expand_dynamic_string_token): Likewise.
* sysdeps/generic/ldsodefs.h (_dl_dst_count, _dl_dst_substitute): Remove
is_path argument.
* elf/dl-load.c (is_dst): Remove checks that is_path is set and name
contains ':'.

4
elf/dl-deps.c
View File

@ -100,7 +100,7 @@ struct list
({ \
const char *__str = (str); \
const char *__result = __str; \
size_t __dst_cnt = DL_DST_COUNT (__str, 0); \
size_t __dst_cnt = DL_DST_COUNT (__str); \
\
if (__dst_cnt != 0) \
{ \
@ -114,7 +114,7 @@ DST not allowed in SUID/SGID programs")); \
__newp = (char *) alloca (DL_DST_REQUIRED (l, __str, strlen (__str), \
__dst_cnt)); \
\
__result = _dl_dst_substitute (l, __str, __newp, 0); \
__result = _dl_dst_substitute (l, __str, __newp); \
\
if (*__result == '\0') \
{ \

4
elf/dl-dst.h
View File

@ -20,13 +20,13 @@
/* Determine the number of DST elements in the name. Only if IS_PATH is
nonzero paths are recognized (i.e., multiple, ':' separated filenames). */
#define DL_DST_COUNT(name, is_path) \
#define DL_DST_COUNT(name) \
({ \
size_t __cnt = 0; \
const char *__sf = strchr (name, '$'); \
\
if (__glibc_unlikely (__sf != NULL)) \
__cnt = _dl_dst_count (__sf, is_path); \
__cnt = _dl_dst_count (__sf); \
\
__cnt; })

32
elf/dl-load.c
View File

@ -180,8 +180,7 @@ is_trusted_path_normalize (const char *path, size_t len)
static size_t
is_dst (const char *start, const char *name, const char *str,
int is_path, int secure)
is_dst (const char *start, const char *name, const char *str, int secure)
{
size_t len;
bool is_curly = false;
@ -219,7 +218,7 @@ is_dst (const char *start, const char *name, const char *str,
size_t
_dl_dst_count (const char *name, int is_path)
_dl_dst_count (const char *name)
{
const char *const start = name;
size_t cnt = 0;
@ -231,10 +230,9 @@ _dl_dst_count (const char *name, int is_path)
/* $ORIGIN is not expanded for SUID/GUID programs (except if it
is $ORIGIN alone) and it must always appear first in path. */
++name;
if ((len = is_dst (start, name, "ORIGIN", is_path,
__libc_enable_secure)) != 0
|| (len = is_dst (start, name, "PLATFORM", is_path, 0)) != 0
|| (len = is_dst (start, name, "LIB", is_path, 0)) != 0)
if ((len = is_dst (start, name, "ORIGIN", __libc_enable_secure)) != 0
|| (len = is_dst (start, name, "PLATFORM", 0)) != 0
|| (len = is_dst (start, name, "LIB", 0)) != 0)
++cnt;
name = strchr (name + len, '$');
@ -246,8 +244,7 @@ _dl_dst_count (const char *name, int is_path)
char *
_dl_dst_substitute (struct link_map *l, const char *name, char *result,
int is_path)
_dl_dst_substitute (struct link_map *l, const char *name, char *result)
{
const char *const start = name;
@ -267,16 +264,15 @@ _dl_dst_substitute (struct link_map *l, const char *name, char *result,
size_t len;
++name;
if ((len = is_dst (start, name, "ORIGIN", is_path,
__libc_enable_secure)) != 0)
if ((len = is_dst (start, name, "ORIGIN", __libc_enable_secure)) != 0)
{
repl = l->l_origin;
check_for_trusted = (__libc_enable_secure
&& l->l_type == lt_executable);
}
else if ((len = is_dst (start, name, "PLATFORM", is_path, 0)) != 0)
else if ((len = is_dst (start, name, "PLATFORM", 0)) != 0)
repl = GLRO(dl_platform);
else if ((len = is_dst (start, name, "LIB", is_path, 0)) != 0)
else if ((len = is_dst (start, name, "LIB", 0)) != 0)
repl = DL_DST_LIB;
if (repl != NULL && repl != (const char *) -1)
@ -320,7 +316,7 @@ _dl_dst_substitute (struct link_map *l, const char *name, char *result,
belonging to the map is loaded. In this case the path element
containing $ORIGIN is left out. */
static char *
expand_dynamic_string_token (struct link_map *l, const char *s, int is_path)
expand_dynamic_string_token (struct link_map *l, const char *s)
{
/* We make two runs over the string. First we determine how large the
resulting string is and then we copy it over. Since this is no
@ -331,7 +327,7 @@ expand_dynamic_string_token (struct link_map *l, const char *s, int is_path)
char *result;
/* Determine the number of DST elements. */
cnt = DL_DST_COUNT (s, is_path);
cnt = DL_DST_COUNT (s);
/* If we do not have to replace anything simply copy the string. */
if (__glibc_likely (cnt == 0))
@ -345,7 +341,7 @@ expand_dynamic_string_token (struct link_map *l, const char *s, int is_path)
if (result == NULL)
return NULL;
return _dl_dst_substitute (l, s, result, is_path);
return _dl_dst_substitute (l, s, result);
}
@ -399,7 +395,7 @@ fillin_rpath (char *rpath, struct r_search_path_elem **result, const char *sep,
{
struct r_search_path_elem *dirp;
to_free = cp = expand_dynamic_string_token (l, cp, 1);
to_free = cp = expand_dynamic_string_token (l, cp);
size_t len = strlen (cp);
@ -2070,7 +2066,7 @@ _dl_map_object (struct link_map *loader, const char *name,
{
/* The path may contain dynamic string tokens. */
realname = (loader
? expand_dynamic_string_token (loader, name, 0)
? expand_dynamic_string_token (loader, name)
: __strdup (name));
if (realname == NULL)
fd = -1;

4
sysdeps/generic/ldsodefs.h
View File

@ -1096,11 +1096,11 @@ extern void _dl_nothread_init_static_tls (struct link_map *) attribute_hidden;
extern const char *_dl_get_origin (void) attribute_hidden;
/* Count DSTs. */
extern size_t _dl_dst_count (const char *name, int is_path) attribute_hidden;
extern size_t _dl_dst_count (const char *name) attribute_hidden;
/* Substitute DST values. */
extern char *_dl_dst_substitute (struct link_map *l, const char *name,
char *result, int is_path) attribute_hidden;
char *result) attribute_hidden;
/* Check validity of the caller. */
extern int _dl_check_caller (const void *caller, enum allowmask mask)