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| author | Florian Weimer <fweimer@redhat.com> | 2021-12-28 22:52:56 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2021-12-28 22:52:56 +0100 |
| commit | 5d28a8962dcb6ec056b81d730e3c6fb57185a210 (patch) | |
| tree | 3d714aaef575deba322fa5a1e29c76c6f96dc850 /dlfcn/Makefile | |
| parent | 83b8d5027d2f80c4603cd706da95d6c9a09a4e16 (diff) | |
| download | glibc-5d28a8962dcb6ec056b81d730e3c6fb57185a210.tar glibc-5d28a8962dcb6ec056b81d730e3c6fb57185a210.tar.gz glibc-5d28a8962dcb6ec056b81d730e3c6fb57185a210.tar.bz2 glibc-5d28a8962dcb6ec056b81d730e3c6fb57185a210.zip | |
elf: Add _dl_find_object function
It can be used to speed up the libgcc unwinder, and the internal
_dl_find_dso_for_object function (which is used for caller
identification in dlopen and related functions, and in dladdr).
_dl_find_object is in the internal namespace due to bug 28503.
If libgcc switches to _dl_find_object, this namespace issue will
be fixed. It is located in libc for two reasons: it is necessary
to forward the call to the static libc after static dlopen, and
there is a link ordering issue with -static-libgcc and libgcc_eh.a
because libc.so is not a linker script that includes ld.so in the
glibc build tree (so that GCC's internal -lc after libgcc_eh.a does
not pick up ld.so).
It is necessary to do the i386 customization in the
sysdeps/x86/bits/dl_find_object.h header shared with x86-64 because
otherwise, multilib installations are broken.
The implementation uses software transactional memory, as suggested
by Torvald Riegel. Two copies of the supporting data structures are
used, also achieving full async-signal-safety.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'dlfcn/Makefile')
| -rw-r--r-- | dlfcn/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/dlfcn/Makefile b/dlfcn/Makefile index 6bbfbb8344..3f5c1bab89 100644 --- a/dlfcn/Makefile +++ b/dlfcn/Makefile @@ -19,7 +19,7 @@ subdir := dlfcn include ../Makeconfig -headers := bits/dlfcn.h dlfcn.h +headers := bits/dlfcn.h bits/dl_find_object.h dlfcn.h extra-libs := libdl libdl-routines := libdl-compat routines = \ |