https://sourceware.org/bugzilla/show_bug.cgi?id=24151
Bug ID: 24151
Summary: Regression about copy relocation of protected data
Product: binutils
Version: 2.31
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: robinlee.sysu at gmail dot com
Target Milestone: ---
clang(7.0.1) does not build correct code for copy relocation of protected data.
And ld.bfd of 2.30 will refuse to link the shared object. But ld.bfd 2.31.1
will not.
I run the test program posted on
https://bugs.llvm.org/show_bug.cgi?id=26580#c0
With binutils 2.30:
clang -O3 -c -o x.o x.c
clang -O3 -fpic -c -o bar.o bar.c
clang -fuse-ld=bfd -shared -o libfoo.so bar.o
/usr/bin/ld.bfd: bar.o: relocation R_X86_64_PC32 against protected symbol `a'
can not be used when making a shared object
/usr/bin/ld.bfd: final link failed: Bad value
clang-7: error: linker command failed with exit code 1 (use -v to see
invocation)
With binutils 2.31.1, linking is completed with no error/warning.
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