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| author |   H.J. Lu <hjl.tools@gmail.com> | 2015-03-31 05:20:55 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2015-03-31 05:21:12 -0700 |
| commit | 83569fb894050db7430047da2219ca50c68f882a (patch) | |
| tree | f9e317037bbc47926fb5e8f955886ea6fafe5337 /configure.ac | |
| parent | Add ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA to x86 (diff) | |
| download | glibc-83569fb894050db7430047da2219ca50c68f882a.tar.gz glibc-83569fb894050db7430047da2219ca50c68f882a.tar.bz2 glibc-83569fb894050db7430047da2219ca50c68f882a.zip | |
Add a testcase for copy reloc against protected data
Linkers in some versions of binutils 2.25 and 2.26 don't support protected
data symbol with error messsage like:
/usr/bin/ld: copy reloc against protected `bar' is invalid
/usr/bin/ld: failed to set dynamic section sizes: Bad value
We check if linker supports copy reloc against protected data symbol to
avoid running the test if linker is broken.
[BZ #17711]
* config.make.in (have-protected-data): New.
* configure.ac: Check linker support for protected data symbol.
* configure: Regenerated.
* elf/Makefile (modules-names): Add tst-protected1moda and
tst-protected1modb if $(have-protected-data) is yes.
(tests): Add tst-protected1a and tst-protected1b if
$(have-protected-data) is yes.
($(objpfx)tst-protected1a): New.
($(objpfx)tst-protected1b): Likewise.
(tst-protected1modb.so-no-z-defs): Likewise.
* elf/tst-protected1a.c: New file.
* elf/tst-protected1b.c: Likewise.
* elf/tst-protected1mod.h: Likewise.
* elf/tst-protected1moda.c: Likewise.
* elf/tst-protected1modb.c: Likewise.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 678c7399ad..39f3e86151 100644 --- a/configure.ac +++ b/configure.ac @@ -1220,6 +1220,29 @@ EOF fi if test $libc_cv_visibility_attribute = yes; then + AC_CACHE_CHECK(linker support for protected data symbol, + libc_cv_protected_data, + [cat > conftest.c <<EOF + int bar __attribute__ ((visibility ("protected"))) = 1; +EOF + libc_cv_protected_data=no + if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles -fPIC -shared conftest.c -o conftest.so); then + cat > conftest.c <<EOF + extern int bar; + int main (void) { return bar; } +EOF + if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles conftest.c -o conftest conftest.so); then + libc_cv_protected_data=yes + fi + fi + rm -f conftest.* + ]) +else + libc_cv_protected_data=no +fi +AC_SUBST(libc_cv_protected_data) + +if test $libc_cv_visibility_attribute = yes; then AC_CACHE_CHECK(for broken __attribute__((visibility())), libc_cv_broken_visibility_attribute, [cat > conftest.c <<EOF |