diff options
| 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 /sysdeps/unix/sysv/linux/powerpc | |
| 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/unix/sysv/linux/powerpc')
4 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist index 3a0213b39f..129a2f16a7 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist @@ -2751,6 +2751,7 @@ GLIBC_2.34 tss_delete F GLIBC_2.34 tss_get F GLIBC_2.34 tss_set F GLIBC_2.35 __memcmpeq F +GLIBC_2.35 _dl_find_object F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist index f57df0234b..7e23226779 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist @@ -2784,6 +2784,7 @@ GLIBC_2.34 tss_delete F GLIBC_2.34 tss_get F GLIBC_2.34 tss_set F GLIBC_2.35 __memcmpeq F +GLIBC_2.35 _dl_find_object F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist index 259a0cfc51..6f97392b70 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist @@ -2507,6 +2507,7 @@ GLIBC_2.34 tss_delete F GLIBC_2.34 tss_get F GLIBC_2.34 tss_set F GLIBC_2.35 __memcmpeq F +GLIBC_2.35 _dl_find_object F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist index 126541daf1..29058a041a 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist @@ -2809,3 +2809,4 @@ GLIBC_2.34 tss_delete F GLIBC_2.34 tss_get F GLIBC_2.34 tss_set F GLIBC_2.35 __memcmpeq F +GLIBC_2.35 _dl_find_object F |