[PATCH v7 3/4] elf: Add a test for PT_LOAD segments with p_align == 1 [BZ #28688]
H.J. Lu
hjl.tools@gmail.com
Mon Jan 3 23:04:32 GMT 2022
Add tst-p_alignmod2-edit to edit the copy of tst-alignmod3.so to set
p_align of the first PT_LOAD segment to 1 and verify that the shared
library can be loaded normally.
---
elf/Makefile | 13 +++++++++++++
elf/tst-p_align2.c | 27 +++++++++++++++++++++++++++
elf/tst-p_alignmod2-edit.c | 27 +++++++++++++++++++++++++++
3 files changed, 67 insertions(+)
create mode 100644 elf/tst-p_align2.c
create mode 100644 elf/tst-p_alignmod2-edit.c
diff --git a/elf/Makefile b/elf/Makefile
index 9c831faac1..e4be3fa518 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -406,7 +406,9 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
ifeq (yes,$(build-shared))
tests += \
tst-p_alignmod1-edit \
+ tst-p_alignmod2-edit \
tst-p_align1 \
+ tst-p_align2 \
endif
@@ -2097,3 +2099,14 @@ $(objpfx)tst-p_alignmod1.so: $(objpfx)tst-p_alignmod1-edit \
cp $(objpfx)tst-alignmod3.so $@
$(test-wrapper-env) $(run-program-env) $(rtld-prefix) \
$(objpfx)tst-p_alignmod1-edit $@
+
+$(objpfx)tst-p_align2: $(objpfx)tst-p_alignmod2.so
+
+# Make a copy of tst-alignmod3.so and update p_align of the first PT_LOAD
+# segment.
+$(objpfx)tst-p_alignmod2.so: $(objpfx)tst-p_alignmod2-edit \
+ $(objpfx)tst-alignmod3.so
+ rm -f $@
+ cp $(objpfx)tst-alignmod3.so $@
+ $(test-wrapper-env) $(run-program-env) $(rtld-prefix) \
+ $(objpfx)tst-p_alignmod2-edit $@
diff --git a/elf/tst-p_align2.c b/elf/tst-p_align2.c
new file mode 100644
index 0000000000..cab9793220
--- /dev/null
+++ b/elf/tst-p_align2.c
@@ -0,0 +1,27 @@
+/* Check different alignments of PT_LOAD segments 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/>. */
+
+extern int do_load_test (void);
+
+static int
+do_test (void)
+{
+ return do_load_test ();
+}
+
+#include <support/test-driver.c>
diff --git a/elf/tst-p_alignmod2-edit.c b/elf/tst-p_alignmod2-edit.c
new file mode 100644
index 0000000000..2f47b37c9e
--- /dev/null
+++ b/elf/tst-p_alignmod2-edit.c
@@ -0,0 +1,27 @@
+/* Set p_align of the first PT_LOAD segment to 1.
+ 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 "tst-elf-edit.h"
+
+/* Set p_align to 1. */
+
+static size_t
+update_p_align (size_t p_align __attribute__ ((unused)))
+{
+ return 1;
+}
--
2.33.1
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