This functionality does not seem to be useful since static dlopen
is mostly used for iconv/character set conversion and NSS support.
gconv modules are loaded with full paths anyway, so that the
HWCAP subdirectory logic does not apply.
---
NEWS | 4 ++++
elf/Makefile | 4 ++--
elf/dl-load.c | 14 ++++++++++++++
3 files changed, 20 insertions(+), 2 deletions(-)
@@ -51,6 +51,10 @@ Deprecated and removed features, and other changes affecting compatibility:
* ldconfig now defaults to the new format for ld.so.cache. glibc has
already supported this format for almost 20 years.
+* When dlopen is used in statically linked programs, alternative library
+ implementations from HWCAP subdirectories are no longer loaded.
+ Instead, the default implementation is used.
+
Changes to build and runtime requirements:
* powerpc64le requires GCC 7.4 or newer. This is required for supporting
@@ -29,7 +29,7 @@ routines = $(all-dl-routines) dl-support dl-iteratephdr \
# The core dynamic linking functions are in libc for the static and
# profiled libraries.
-dl-routines = $(addprefix dl-,load lookup object reloc deps hwcaps \
+dl-routines = $(addprefix dl-,load lookup object reloc deps \
runtime init fini debug misc \
version profile tls origin scope \
execstack open close trampoline \
@@ -59,7 +59,7 @@ elide-routines.os = $(all-dl-routines) dl-support enbl-secure dl-origin \
# ld.so uses those routines, plus some special stuff for being the program
# interpreter and operating independent of libc.
rtld-routines = rtld $(all-dl-routines) dl-sysdep dl-environ dl-minimal \
- dl-error-minimal dl-conflict
+ dl-error-minimal dl-conflict dl-hwcaps
all-rtld-routines = $(rtld-routines) $(sysdep-rtld-routines)
CFLAGS-dl-runtime.c += -fexceptions -fasynchronous-unwind-tables
@@ -101,9 +101,13 @@ int __stack_prot attribute_hidden attribute_relro
static struct r_search_path_struct env_path_list attribute_relro;
/* List of the hardware capabilities we might end up using. */
+#ifdef SHARED
static const struct r_strlenpair *capstr attribute_relro;
static size_t ncapstr attribute_relro;
static size_t max_capstrlen attribute_relro;
+#else
+enum { ncapstr = 1, max_capstrlen = 0 };
+#endif
/* Get the generated information about the trusted directories. Use
@@ -691,9 +695,11 @@ _dl_init_paths (const char *llp)
/* Fill in the information about the application's RPATH and the
directories addressed by the LD_LIBRARY_PATH environment variable. */
+#ifdef SHARED
/* Get the capabilities. */
capstr = _dl_important_hwcaps (GLRO(dl_platform), GLRO(dl_platformlen),
&ncapstr, &max_capstrlen);
+#endif
/* First set up the rest of the default search directory entries. */
aelem = rtld_search_dirs.dirs = (struct r_search_path_elem **)
@@ -1443,11 +1449,15 @@ print_search_path (struct r_search_path_elem **list,
for (cnt = 0; cnt < ncapstr; ++cnt)
if ((*list)->status[cnt] != nonexisting)
{
+#ifdef SHARED
char *cp = __mempcpy (endp, capstr[cnt].str, capstr[cnt].len);
if (cp == buf || (cp == buf + 1 && buf[0] == '/'))
cp[0] = '\0';
else
cp[-1] = '\0';
+#else
+ *endp = '\0';
+#endif
_dl_debug_printf_c (first ? "%s" : ":%s", buf);
first = 0;
@@ -1808,11 +1818,15 @@ open_path (const char *name, size_t namelen, int mode,
if (this_dir->status[cnt] == nonexisting)
continue;
+#ifdef SHARED
buflen =
((char *) __mempcpy (__mempcpy (edp, capstr[cnt].str,
capstr[cnt].len),
name, namelen)
- buf);
+#else
+ buflen = (char *) __mempcpy (edp, name, namelen) - buf;
+#endif
/* Print name we try if this is wanted. */
if (__glibc_unlikely (GLRO(dl_debug_mask) & DL_DEBUG_LIBS))