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x86-64: Handle undefined IFUNC symbol with -z now 

Since undefined IFUNC symbol is treated as normal FUNC symbol, don't
abort on undefined IFUNC symbol in the second PLT.

bfd/

	PR ld/21401
	* elf64-x86-64.c (elf_x86_64_finish_dynamic_symbol): Don't abort
	on on undefined IFUNC symbol in the second PLT.

ld/

	PR ld/21401
	* testsuite/ld-ifunc/ifunc.exp: Add a libtest-2-now.so test with
	-z now.
This commit is contained in:
H.J. Lu 2017-04-19 09:59:14 -07:00
parent a6c21d4a55
commit e492d2f8ac
4 changed files with 21 additions and 1 deletions
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6
bfd/ChangeLog
View File

@ -1,3 +1,9 @@
2017-04-19 H.J. Lu <hongjiu.lu@intel.com>
PR ld/21401
* elf64-x86-64.c (elf_x86_64_finish_dynamic_symbol): Don't abort
on on undefined IFUNC symbol in the second PLT.
2017-04-19 Wedson Almeida Filho <wedsonaf@gmail.com>
* peXXigen.c (pe_print_reloc): Correct chunk_end.

2
bfd/elf64-x86-64.c
View File

@ -6013,7 +6013,7 @@ elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
got_offset = h->got.offset;
if (got_offset == (bfd_vma) -1
|| h->type == STT_GNU_IFUNC
|| (h->type == STT_GNU_IFUNC && h->def_regular)
|| plt == NULL
|| got == NULL)
abort ();

6
ld/ChangeLog
View File

@ -1,3 +1,9 @@
2017-04-19 H.J. Lu <hongjiu.lu@intel.com>
PR ld/21401
* testsuite/ld-ifunc/ifunc.exp: Add a libtest-2-now.so test with
-z now.
2017-04-19 Alan Modra <amodra@gmail.com>
* ld.texinfo (dynamic-undefined-weak): Document.

8
ld/testsuite/ld-ifunc/ifunc.exp
View File

@ -234,6 +234,10 @@ if ![ld_link $ld "tmpdir/libtest-2.so" "-shared tmpdir/test-2.o"] {
fail "Could not link libtest-2.so"
set fails [expr $fails + 1]
}
if ![ld_link $ld "tmpdir/libtest-2-now.so" "-shared -z now tmpdir/test-2.o"] {
fail "Could not link libtest-2-now.so"
set fails [expr $fails + 1]
}
if { $fails == 0 } {
pass "Building ifunc binaries"
@ -306,6 +310,10 @@ if {[contains_ifunc_symbol tmpdir/libtest-2.so] != 0} {
fail "libtest-2.so contains IFUNC symbols"
set fails [expr $fails + 1]
}
if {[contains_ifunc_symbol tmpdir/libtest-2-now.so] != 0} {
fail "libtest-2-now.so contains IFUNC symbols"
set fails [expr $fails + 1]
}
# The linked ifunc using executables and shared libraries should contain
# a dynamic reloc referencing the IFUNC symbol. (Even the static