diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2025-07-28 12:18:22 -0700 |
|---|---|---|
| committer | Sam James <sam@gentoo.org> | 2025-08-15 22:16:48 +0100 |
| commit | 3970785bebcc3f1de4460072f3a041d178f64846 (patch) | |
| tree | 89a7929e1bf56198bd011748ff7f80672f3dcf2c | |
| parent | d0f72b96f2e91e1aa93f7e826c71f74078ada7d0 (diff) | |
x86-64: Add GLIBC_ABI_GNU2_TLS version [BZ #33129]
Programs and shared libraries compiled with -mtls-dialect=gnu2 may fail
silently at run-time against glibc without the GNU2 TLS run-time fix
for:
https://sourceware.org/bugzilla/show_bug.cgi?id=31372
Add GLIBC_ABI_GNU2_TLS version to indicate that glibc has the working
GNU2 TLS run-time. Linker can add the GLIBC_ABI_GNU2_TLS version to
binaries which depend on the working GNU2 TLS run-time:
https://sourceware.org/bugzilla/show_bug.cgi?id=33130
so that such programs and shared libraries will fail to load and run at
run-time against libc.so without the GLIBC_ABI_GNU2_TLS version, instead
of fail silently at random.
This fixes BZ #33129.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
(cherry picked from commit 9df8fa397d515dc86ff5565f6c45625e672d539e)
| -rw-r--r-- | sysdeps/x86_64/Makefile | 9 | ||||
| -rw-r--r-- | sysdeps/x86_64/Versions | 5 |
2 files changed, 14 insertions, 0 deletions
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile index c3e1065c81..3ab8c1ed0f 100644 --- a/sysdeps/x86_64/Makefile +++ b/sysdeps/x86_64/Makefile @@ -212,6 +212,15 @@ LDFLAGS-tst-plt-rewrite2 = -Wl,-z,now LDFLAGS-tst-plt-rewritemod2.so = -Wl,-z,now,-z,undefs tst-plt-rewrite2-ENV = GLIBC_TUNABLES=glibc.cpu.plt_rewrite=2 $(objpfx)tst-plt-rewrite2: $(objpfx)tst-plt-rewritemod2.so + +tests-special += $(objpfx)check-gnu2-tls.out + +$(objpfx)check-gnu2-tls.out: $(common-objpfx)libc.so + LC_ALL=C $(READELF) -V -W $< \ + | sed -ne '/.gnu.version_d/, /.gnu.version_r/ p' \ + | grep GLIBC_ABI_GNU2_TLS > $@; \ + $(evaluate-test) +generated += check-gnu2-tls.out endif test-internal-extras += tst-gnu2-tls2mod1 diff --git a/sysdeps/x86_64/Versions b/sysdeps/x86_64/Versions index e94758b236..a63c11bcb2 100644 --- a/sysdeps/x86_64/Versions +++ b/sysdeps/x86_64/Versions @@ -5,6 +5,11 @@ libc { GLIBC_2.13 { __fentry__; } + GLIBC_ABI_GNU2_TLS { + # This symbol is used only for empty version map and will be removed + # by scripts/versions.awk. + __placeholder_only_for_empty_version_map; + } } libm { GLIBC_2.1 { |