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Add a testcase to check alignment of PT_LOAD segment [BZ #28676]

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This commit is contained in:
H.J. Lu 2021-12-09 07:01:33 -08:00
parent 718fdd87b1
commit fc2334ab32
3 changed files with 82 additions and 2 deletions
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14
elf/Makefile
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@ -207,7 +207,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
tst-tls4 tst-tls5 \
tst-tls10 tst-tls11 tst-tls12 tst-tls13 tst-tls14 tst-tls15 \
tst-tls16 tst-tls17 tst-tls18 tst-tls19 tst-tls-dlinfo \
tst-align tst-align2 \
tst-align tst-align2 tst-align3 \
tst-dlmodcount tst-dlopenrpath tst-deep1 \
tst-dlmopen1 tst-dlmopen3 tst-dlmopen4 \
unload3 unload4 unload5 unload6 unload7 unload8 tst-global1 order2 \
@ -241,6 +241,9 @@ tests-internal += loadtest unload unload2 circleload1 \
tests-container += tst-pldd tst-dlopen-tlsmodid-container \
tst-dlopen-self-container tst-preload-pthread-libc
test-srcs = tst-pathopt
ifeq (yes,$(have-fpie))
tests-pie += tst-align3
endif
selinux-enabled := $(shell cat /selinux/enforce 2> /dev/null)
ifneq ($(selinux-enabled),1)
tests-execstack-yes = tst-execstack tst-execstack-needed tst-execstack-prog
@ -302,7 +305,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
circlemod3 circlemod3a \
reldep8mod1 reldep8mod2 reldep8mod3 \
reldep9mod1 reldep9mod2 reldep9mod3 \
tst-alignmod tst-alignmod2 \
tst-alignmod tst-alignmod2 tst-alignmod3 \
$(modules-execstack-$(have-z-execstack)) \
tst-dlopenrpathmod tst-deep1mod1 tst-deep1mod2 tst-deep1mod3 \
tst-dlmopen1mod tst-auditmod1 \
@ -1093,6 +1096,13 @@ CFLAGS-tst-alignmod.c += $(stack-align-test-flags)
CFLAGS-tst-alignmod2.c += $(stack-align-test-flags)
$(objpfx)tst-align.out: $(objpfx)tst-alignmod.so
$(objpfx)tst-align2: $(objpfx)tst-alignmod2.so
$(objpfx)tst-align3: $(objpfx)tst-alignmod3.so
ifeq (yes,$(have-fpie))
CFLAGS-tst-align3.c += $(PIE-ccflag)
endif
LDFLAGS-tst-align3 += -Wl,-z,max-page-size=0x200000
LDFLAGS-tst-alignmod3.so += -Wl,-z,max-page-size=0x200000
$(objpfx)tst-alignmod3.so: $(libsupport)
$(objpfx)unload3.out: $(objpfx)unload3mod1.so $(objpfx)unload3mod2.so \
$(objpfx)unload3mod3.so $(objpfx)unload3mod4.so

38
elf/tst-align3.c Normal file
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@ -0,0 +1,38 @@
/* Check alignment of PT_LOAD segment in a shared library.
Copyright (C) 2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <support/check.h>
#include <tst-stack-align.h>
/* This should cover all possible page sizes we currently support. */
#define ALIGN 0x200000
int bar __attribute__ ((aligned (ALIGN))) = 1;
extern int do_load_test (void);
static int
do_test (void)
{
printf ("bar: %p\n", &bar);
TEST_VERIFY (is_aligned (&bar, ALIGN) == 0);
return do_load_test ();
}
#include <support/test-driver.c>

32
elf/tst-alignmod3.c Normal file
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@ -0,0 +1,32 @@
/* Check alignment of PT_LOAD segment in a shared library.
Copyright (C) 2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <support/check.h>
#include <tst-stack-align.h>
/* This should cover all possible page sizes we currently support. */
#define ALIGN 0x200000
int foo __attribute__ ((aligned (ALIGN))) = 1;
void
do_load_test (void)
{
printf ("foo: %p\n", &foo);
TEST_VERIFY (is_aligned (&foo, ALIGN) == 0);
}