|| (offsetof (struct Elf, state.elf32.scns)
== offsetof (struct Elf, state.elf64.scns))
? &elf->state.elf32.scns : &elf->state.elf64.scns);
+
+ /* Section zero is special. It always exists even if there is no
+ "first" section. And it is needed to store "overflow" values
+ from the Elf header. */
+ if (idx == 0 && runp->cnt == 0 && runp->max > 0)
+ {
+ Elf_Scn *scn0 = &runp->data[0];
+ if (elf->class == ELFCLASS32)
+ {
+ scn0->shdr.e32 = (Elf32_Shdr *) calloc (1, sizeof (Elf32_Shdr));
+ if (scn0->shdr.e32 == NULL)
+ {
+ __libelf_seterrno (ELF_E_NOMEM);
+ goto out;
+ }
+ }
+ else
+ {
+ scn0->shdr.e64 = (Elf64_Shdr *) calloc (1, sizeof (Elf64_Shdr));
+ if (scn0->shdr.e64 == NULL)
+ {
+ __libelf_seterrno (ELF_E_NOMEM);
+ goto out;
+ }
+ }
+ scn0->elf = elf;
+ scn0->shdr_flags = ELF_F_DIRTY | ELF_F_MALLOCED;
+ scn0->list = elf->state.elf.scns_last;
+ scn0->data_read = 1;
+ runp->cnt = 1;
+ }
+
while (1)
{
if (idx < runp->max)
}
}
+ out:
rwlock_unlock (elf->lock);
return result;
--- /dev/null
+#! /bin/sh
+# Copyright (C) 2018 Red Hat, Inc.
+# This file is part of elfutils.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# elfutils 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Same as run-copyadd-sections.sh, but for many > 0xffff sections.
+# Doesn't use mmap for addsections since that doesn't work.
+# ELF_C_RDWR_MMAP needs mremap which will fail since it needs too
+# much space and the original mmap cannot move.
+
+. $srcdir/test-subr.sh
+
+test_copy_and_add ()
+{
+ in_file="$1"
+ out_file="${in_file}.copy"
+ out_file_mmap="${out_file}.mmap"
+
+ tempfiles ${out_file} ${out_file_mmap} readelf.out
+
+ # Can we copy the file?
+ testrun ${abs_builddir}/elfcopy ${in_file} ${out_file}
+ testrun ${abs_top_builddir}/src/elfcmp ${in_file} ${out_file}
+
+ # Can we add a section (in-place)?
+ testrun ${abs_builddir}/addsections 65535 ${out_file}
+ testrun ${abs_top_builddir}/src/readelf -S ${out_file} > readelf.out
+ nr=$(grep '.extra' readelf.out | wc -l)
+ # We try twice...
+ if test ${nr} != 65535 -a ${nr} != 131070; then
+ # Show what went wrong
+ testrun ${abs_top_builddir}/src/readelf -S ${out_file}
+ exit 1
+ fi
+
+ # Can we copy the file using ELF_C_WRITE_MMAP?
+ testrun ${abs_builddir}/elfcopy --mmap ${in_file} ${out_file_mmap}
+ testrun ${abs_top_builddir}/src/elfcmp ${in_file} ${out_file_mmap}
+
+ # Don't try to add using mmap (see above)
+}
+
+# A collection of random testfiles to test 32/64bit, little/big endian
+# and non-ET_REL (with phdrs)/ET_REL (without phdrs).
+# Try to add 0xffff sections twice.
+
+# 32bit, big endian, rel
+testfiles testfile29
+test_copy_and_add testfile29
+test_copy_and_add testfile29.copy
+
+# 64bit, big endian, rel
+testfiles testfile23
+test_copy_and_add testfile23
+test_copy_and_add testfile23.copy
+
+# 32bit, little endian, rel
+testfiles testfile9
+test_copy_and_add testfile9
+test_copy_and_add testfile9.copy
+
+# 64bit, little endian, rel
+testfiles testfile38
+test_copy_and_add testfile38
+test_copy_and_add testfile38.copy
+
+# 32bit, big endian, non-rel
+testfiles testfile26
+test_copy_and_add testfile26
+test_copy_and_add testfile26.copy
+
+# 64bit, big endian, non-rel
+testfiles testfile27
+test_copy_and_add testfile27
+test_copy_and_add testfile27.copy
+
+# 32bit, little endian, non-rel
+testfiles testfile
+test_copy_and_add testfile
+test_copy_and_add testfile.copy
+
+# 64bit, little endian, non-rel
+testfiles testfile10
+test_copy_and_add testfile10
+test_copy_and_add testfile10.copy
+
+exit 0
projects / thirdparty / elfutils.git / commitdiff
