diff options
| author | Florian Weimer <fweimer@redhat.com> | 2021-05-17 09:59:14 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2021-05-17 10:06:57 +0200 |
| commit | 78b31cc8341ab8268c468cd0f4f988d1d7862a55 (patch) | |
| tree | 52a91d569feb58d40449e34028ffb35b95f6e541 /sysdeps/generic/ldsodefs.h | |
| parent | 23ce1cf35a59a4fdb3dabe073e3d1fe2b76fb0ca (diff) | |
| download | glibc-78b31cc8341ab8268c468cd0f4f988d1d7862a55.tar.xz glibc-78b31cc8341ab8268c468cd0f4f988d1d7862a55.zip | |
elf: Partially initialize ld.so after static dlopen (bug 20802)
After static dlopen, a copy of ld.so is loaded into the inner
namespace, but that copy is not initialized at all. Some
architectures run into serious problems as result, which is why the
_dl_var_init mechanism was invented. With libpthread moving into
libc and parts into ld.so, more architectures impacted, so it makes
sense to switch to a generic mechanism which performs the partial
initialization.
As a result, getauxval now works after static dlopen (bug 20802).
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/generic/ldsodefs.h')
| -rw-r--r-- | sysdeps/generic/ldsodefs.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 8426b5cbd8..e43d6f5ecd 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -1313,6 +1313,13 @@ dl_init_static_tls (struct link_map *map) #endif } +#ifndef SHARED +/* Called before relocating ld.so during static dlopen. This can be + used to partly initialize the dormant ld.so copy in the static + dlopen namespace. */ +void __rtld_static_init (struct link_map *map) attribute_hidden; +#endif + /* Return true if the ld.so copy in this namespace is actually active and working. If false, the dl_open/dlfcn hooks have to be used to call into the outer dynamic linker (which happens after static |