mirror of
https://git.yoctoproject.org/poky
synced 2026-05-07 16:59:22 +00:00
Clemens Lang
3ece01215a
Yocto's ldconfig-native was exported from an old version of glibc and
generates an ld.so.cache that is partially ignored by current versions
of glibc when loading libraries. This occurs for 64-bit binaries, where
glibc expects FLAG_ELF_LIBC6, but ldconfig-native only generates the
standard ELF flag. Fix this with an additional patch on top of the patch
for now.
You can verify this by applying the patch below to your target copy of
glibc and running
LD_DEBUG=libs /lib64/ld-linux-x86-64.so.2 --list $anybinary
--- ./elf/dl-cache.c.orig 2016-01-07 11:05:36.823447171 +0100
+++ ./elf/dl-cache.c 2016-01-07 11:19:53.925878628 +0100
@@ -106,6 +106,8 @@
if (_dl_cache_check_flags (flags) \
&& _dl_cache_verify_ptr (lib->value)) \
{ \
+ if (__glibc_unlikely (GLRO_dl_debug_mask & DL_DEBUG_LIBS))\
+ _dl_debug_printf (" considering file %s\n", cache_data + lib->value); \
if (best == NULL || flags == GLRO(dl_correct_cache_id)) \
{ \
HWCAP_CHECK; \
@@ -117,6 +119,9 @@
searching. */ \
break; \
} \
+ } else { \
+ if (__glibc_unlikely (GLRO_dl_debug_mask & DL_DEBUG_LIBS)) \
+ _dl_debug_printf (" ignoring file %s due to flags %x, expected %x\n", cache_data + lib->value, lib->flags, GLRO(dl_correct_cache_id)); \
} \
} \
while (++middle <= right); \
@@ -265,14 +270,23 @@
/* Only accept hwcap if it's for the right platform. */
#define HWCAP_CHECK \
- if (lib->hwcap & hwcap_exclude) \
+ if (lib->hwcap & hwcap_exclude) { \
+ if (__glibc_unlikely (GLRO_dl_debug_mask & DL_DEBUG_LIBS)) \
+ _dl_debug_printf (" hwcap mismatch %x vs. %x\n", lib->hwcap, hwcap_exclude); \
continue; \
- if (GLRO(dl_osversion) && lib->osversion > GLRO(dl_osversion)) \
+ } \
+ if (GLRO(dl_osversion) && lib->osversion > GLRO(dl_osversion)) { \
+ if (__glibc_unlikely (GLRO_dl_debug_mask & DL_DEBUG_LIBS)) \
+ _dl_debug_printf (" os version mismatch %x vs. %x\n", lib->osversion, GLRO(dl_osversion)); \
continue; \
+ } \
if (_DL_PLATFORMS_COUNT \
&& (lib->hwcap & _DL_HWCAP_PLATFORM) != 0 \
- && (lib->hwcap & _DL_HWCAP_PLATFORM) != platform) \
- continue
+ && (lib->hwcap & _DL_HWCAP_PLATFORM) != platform) { \
+ if (__glibc_unlikely (GLRO_dl_debug_mask & DL_DEBUG_LIBS)) \
+ _dl_debug_printf (" platform mismatch %x vs. %x\n", lib->hwcap & _DL_HWCAP_PLATFORM, platform); \
+ continue; \
+ }
SEARCH_CACHE (cache_new);
}
else
This version of ldconfig-native should really be replaced with a version
matching the glibc source in use on the target platform.
(From OE-Core rev: bf9c1e6fa1c8eb86670383bad9b7c2e54bfe17f4)
Signed-off-by: Clemens Lang <clemens.lang@bmw-carit.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
====
Poky is an integration of various components to form a complete prepackaged
build system and development environment. It features support for building
customised embedded device style images. There are reference demo images
featuring a X11/Matchbox/GTK themed UI called Sato. The system supports
cross-architecture application development using QEMU emulation and a
standalone toolchain and SDK with IDE integration.
Additional information on the specifics of hardware that Poky supports
is available in README.hardware. Further hardware support can easily be added
in the form of layers which extend the systems capabilities in a modular way.
As an integration layer Poky consists of several upstream projects such as
BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information
e.g. for the hardware support. Poky is in turn a component of the Yocto Project.
The Yocto Project has extensive documentation about the system including a
reference manual which can be found at:
http://yoctoproject.org/documentation
OpenEmbedded-Core is a layer containing the core metadata for current versions
of OpenEmbedded. It is distro-less (can build a functional image with
DISTRO = "nodistro") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website:
http://www.openembedded.org/
Where to Send Patches
=====================
As Poky is an integration repository (built using a tool called combo-layer),
patches against the various components should be sent to their respective
upstreams:
bitbake:
Git repository: http://git.openembedded.org/bitbake/
Mailing list: bitbake-devel@lists.openembedded.org
documentation:
Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/
Mailing list: yocto@yoctoproject.org
meta-poky, meta-yocto-bsp:
Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/meta-yocto(-bsp)
Mailing list: poky@yoctoproject.org
Everything else should be sent to the OpenEmbedded Core mailing list. If in
doubt, check the oe-core git repository for the content you intend to modify.
Before sending, be sure the patches apply cleanly to the current oe-core git
repository.
Git repository: http://git.openembedded.org/openembedded-core/
Mailing list: openembedded-core@lists.openembedded.org
Note: The scripts directory should be treated with extra care as it is a mix of
oe-core and poky-specific files.