146 lines
4.5 KiB
Diff
146 lines
4.5 KiB
Diff
From ab887596903b159107e0be6f8b25986a5597cfca Mon Sep 17 00:00:00 2001
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From: "H.J. Lu" <hjl.tools@gmail.com>
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Date: Mon, 7 Feb 2022 10:44:17 -0500
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Subject: [PATCH 2/4] Add a testcase to check alignment of PT_LOAD segment [BZ
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#28676]
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Backport from master commit: fc2334a
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Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
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---
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elf/Makefile | 14 ++++++++++++--
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elf/tst-align3.c | 38 ++++++++++++++++++++++++++++++++++++++
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elf/tst-alignmod3.c | 32 ++++++++++++++++++++++++++++++++
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3 files changed, 82 insertions(+), 2 deletions(-)
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create mode 100644 elf/tst-align3.c
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create mode 100644 elf/tst-alignmod3.c
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diff --git a/elf/Makefile b/elf/Makefile
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index 2093cefa..0d3366e2 100644
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--- a/elf/Makefile
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+++ b/elf/Makefile
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@@ -331,6 +331,7 @@ tests += \
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tst-addr1 \
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tst-align \
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tst-align2 \
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+ tst-align3 \
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tst-audit-tlsdesc \
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tst-audit-tlsdesc-dlopen \
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tst-audit1 \
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@@ -467,6 +468,10 @@ test-srcs = \
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tst-pathopt
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# tests-srcs
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+ifeq (yes,$(have-fpie))
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+tests-pie += tst-align3
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+endif
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+
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selinux-enabled := $(shell cat /selinux/enforce 2> /dev/null)
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ifneq ($(selinux-enabled),1)
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@@ -647,6 +652,7 @@ modules-names = \
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tst-absolute-zero-lib \
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tst-alignmod \
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tst-alignmod2 \
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+ tst-alignmod3 \
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tst-array2dep \
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tst-array5dep \
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tst-audit-tlsdesc-mod1 \
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@@ -1669,6 +1675,12 @@ CFLAGS-tst-alignmod2.c += $(stack-align-test-flags)
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$(objpfx)tst-align: $(libdl)
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$(objpfx)tst-align.out: $(objpfx)tst-alignmod.so
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$(objpfx)tst-align2: $(objpfx)tst-alignmod2.so
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+ifeq (yes,$(have-fpie))
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+CFLAGS-tst-align3.c += $(PIE-ccflag)
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+endif
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+LDFLAGS-tst-align3 += -Wl,-z,max-page-size=0x200000
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+LDFLAGS-tst-alignmod3.so += -Wl,-z,max-page-size=0x200000
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+$(objpfx)tst-alignmod3.so: $(libsupport)
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$(objpfx)unload3: $(libdl)
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$(objpfx)unload3.out: $(objpfx)unload3mod1.so $(objpfx)unload3mod2.so \
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diff --git a/elf/tst-align3.c b/elf/tst-align3.c
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new file mode 100644
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index 00000000..ac86d623
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--- /dev/null
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+++ b/elf/tst-align3.c
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@@ -0,0 +1,38 @@
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+/* Check alignment of PT_LOAD segment in a shared library.
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+ Copyright (C) 2021 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#include <support/check.h>
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+#include <tst-stack-align.h>
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+
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+/* This should cover all possible page sizes we currently support. */
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+#define ALIGN 0x200000
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+
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+int bar __attribute__ ((aligned (ALIGN))) = 1;
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+
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+extern int do_load_test (void);
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+
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+static int
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+do_test (void)
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+{
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+ printf ("bar: %p\n", &bar);
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+ TEST_VERIFY (is_aligned (&bar, ALIGN) == 0);
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+
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+ return do_load_test ();
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+}
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+
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+#include <support/test-driver.c>
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diff --git a/elf/tst-alignmod3.c b/elf/tst-alignmod3.c
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new file mode 100644
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index 00000000..0d33f237
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--- /dev/null
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+++ b/elf/tst-alignmod3.c
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@@ -0,0 +1,32 @@
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+/* Check alignment of PT_LOAD segment in a shared library.
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+ Copyright (C) 2021 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#include <support/check.h>
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+#include <tst-stack-align.h>
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+
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+/* This should cover all possible page sizes we currently support. */
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+#define ALIGN 0x200000
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+
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+int foo __attribute__ ((aligned (ALIGN))) = 1;
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+
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+void
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+do_load_test (void)
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+{
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+ printf ("foo: %p\n", &foo);
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+ TEST_VERIFY (is_aligned (&foo, ALIGN) == 0);
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+}
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--
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2.18.4
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