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LD/testsuite: Conditionalize the placement of `.got' in GNU_RELRO 

Complement commit d345186d05 ("Check if GNU_RELRO segment is is
generated") and exclude the presence of a `.got' section from implying
the creation of a GNU_RELRO segment for targets which place the section
along with small data, and therefore as it stands cannot have the
section assigned to GNU_RELRO.  This is because we currently only
support a single GNU_RELRO segment and we place it at the beginning of
regular data which is then separated from small data by read-write data.

Currently the list of such targets consists of Alpha, Linux HPPA, NetBSD
HPPA, OpenBSD HPPA, Meta, MIPS, Nios II, OpenRISC 1000, RISC-V, SH and
X86-64, as determined by examining default linker scripts produced in a
`--enable-targets=all' build for those that have DATA_SEGMENT_RELRO_END
set and `.got' placed beyond.  These targets do not set NO_SMALL_DATA or
DATA_GOT in their respective files in ld/emulparams/*, hovever checking
for the absence of these settings on its own is not very feasible due to
the structure of these files and the lack of support for GNU_RELRO by
some targets in the first place.

Add a separate control for `.got.plt' which does get placed in GNU_RELRO
on MIPS targets even though `.got' does not.

	ld/
	* testsuite/ld-elf/binutils.exp (binutils_test): Make the
	expectation for `.got' in GNU_RELRO segment target-specific.
	Handle `.got.plt' separately.
This commit is contained in:
Maciej W. Rozycki 2017-07-18 17:20:30 +01:00
parent 9a0f1d5099
commit 927960f053
2 changed files with 24 additions and 1 deletions
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6
ld/ChangeLog
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@ -1,3 +1,9 @@
2017-07-18 Maciej W. Rozycki <macro@imgtec.com>
* testsuite/ld-elf/binutils.exp (binutils_test): Make the
expectation for `.got' in GNU_RELRO segment target-specific.
Handle `.got.plt' separately.
2017-07-18 Maciej W. Rozycki <macro@imgtec.com>
* testsuite/ld-elf/binutils.exp (binutils_test): Make the

19
ld/testsuite/ld-elf/binutils.exp
View File

@ -86,13 +86,30 @@ proc binutils_test { prog_name ld_options test {test_name ""} {readelf_options "
set relro_dynamic [expr !([istarget "hppa64*-*-*"] \
|| ([istarget "mips*-*-*"] \
&& ![istarget "*-*-vxworks*"]))]
# These targets have `.got' in regular data even though they do
# not have `.got' there.
set relro_gotplt [expr [istarget "mips*-*-*"]]
# These targets do not set NO_SMALL_DATA or DATA_GOT and therefore
# have `.got' in (read-write) small data rather than regular data.
set relro_got [expr !([istarget "alpha*-*-*"] \
|| [istarget "hppa*-*-linux-*"] \
|| [istarget "hppa*-*-netbsd*"] \
|| [istarget "hppa*-*-openbsd*"] \
|| [istarget "metag-*-*"] \
|| [istarget "mips*-*-*"] \
|| [istarget "nios2*-*-*"] \
|| [istarget "or1k-*-*"] \
|| [istarget "riscv*-*-*"] \
|| [istarget "sh*-*-*"] \
|| [istarget "x86_64-*-rdos*"])]
# Check if GNU_RELRO segment is generated.
set got [remote_exec host "grep GNU_RELRO tmpdir/$test.exp"]
if { ![string match "*GNU_RELRO*" $got] } then {
set got [remote_exec host "cat tmpdir/$test.exp"]
if { [string match "*.data.rel.ro*" $got]
|| ($relro_dynamic && [string match "*.dynamic*" $got])
|| [string match "*.got*" $got]
|| ($relro_gotplt && [string match "*.got.plt*" $got])
|| ($relro_got && [string match "*.got*" $got])
|| [string match "*.eh_frame*" $got]
|| [string match "*.gcc_except_table*" $got]
|| [string match "*.exception_ranges*" $got]