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author | Florian Weimer <fweimer@redhat.com> | 2021-12-28 22:52:56 +0100 |
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committer | Florian Weimer <fweimer@redhat.com> | 2021-12-28 22:52:56 +0100 |
commit | 5d28a8962dcb6ec056b81d730e3c6fb57185a210 (patch) | |
tree | 3d714aaef575deba322fa5a1e29c76c6f96dc850 /sysdeps/x86_64/fpu/test-double-vlen4-avx2-wrappers.c | |
parent | 83b8d5027d2f80c4603cd706da95d6c9a09a4e16 (diff) | |
download | glibc-5d28a8962dcb6ec056b81d730e3c6fb57185a210.tar.gz glibc-5d28a8962dcb6ec056b81d730e3c6fb57185a210.tar.xz 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 'sysdeps/x86_64/fpu/test-double-vlen4-avx2-wrappers.c')
0 files changed, 0 insertions, 0 deletions