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PR22374 testcase, function pointer references in .data

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Function pointer references in .data ought to use a dynamic reloc.
There shouldn't be any need for a PLT entry and definitely no copy
reloc.

This test fails on quite a few targets, but isn't something that
anyone should worry about too much.  It's really just a missed
optimization.

	PR 22374
	* testsuite/ld-elf/pr22374a.s,
	* testsuite/ld-elf/pr22374b.s,
	* testsuite/ld-elf/pr22374-1.r,
	* testsuite/ld-elf/pr22374-2.r: New test.
	* testsuite/ld-elf/elf.exp: Run it.
This commit is contained in:
Alan Modra 2017-10-31 11:13:30 +10:30
parent 46b06a98d1
commit e48f0c8f1b
6 changed files with 39 additions and 0 deletions
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9
ld/ChangeLog
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@ -1,3 +1,12 @@
2017-11-01 Alan Modra <amodra@gmail.com>
PR 22374
* testsuite/ld-elf/pr22374a.s,
* testsuite/ld-elf/pr22374b.s,
* testsuite/ld-elf/pr22374-1.r,
* testsuite/ld-elf/pr22374-2.r: New test.
* testsuite/ld-elf/elf.exp: Run it.
2017-11-01 Alan Modra <amodra@gmail.com>
* testsuite/ld-elf/elf.exp: Merge some conditionals, a better

11
ld/testsuite/ld-elf/elf.exp
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@ -192,6 +192,17 @@ if { [check_shared_lib_support] } then {
"pr20995-2" \
"" "tmpdir/pr20995-2.so" "$AFLAGS_NONPIC" \
{pr20995a.s} {{readelf {-S --wide} pr20995.r}} "pr20995-2"]]
setup_xfail "tic6x-*-*"
run_ld_link_tests {
{"Build pr22374 shared library"
"-shared" "" "" "pr22374b.s" {} "pr22374.so" }
{"pr22374 function pointer initialization"
"" "tmpdir/pr22374.so" "" "pr22374a.s"
{ {readelf {--wide -r --dyn-syms} "pr22374-1.r"}
{readelf {--wide -r} "pr22374-2.r"} }
"pr22374" }
}
}
if [is_underscore_target] {

8
ld/testsuite/ld-elf/pr22374-1.r Normal file
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@ -0,0 +1,8 @@
Relocation section .* contains 1 entries:
.*
.* +0+ +foo.*
Symbol table '.dynsym' contains .* entries:
#...
.*: 0+ +0 FUNC +GLOBAL DEFAULT +UND foo
#pass

4
ld/testsuite/ld-elf/pr22374-2.r Normal file
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@ -0,0 +1,4 @@
#failif
Relocation section .* contains 1 entries:
.*
.*COPY.*

2
ld/testsuite/ld-elf/pr22374a.s Normal file
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@ -0,0 +1,2 @@
.data
.dc.a foo

5
ld/testsuite/ld-elf/pr22374b.s Normal file
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@ -0,0 +1,5 @@
.global foo
.type foo, %function
foo:
.dc.a 0
.size foo, .-foo