99 lines
3.8 KiB
Diff
99 lines
3.8 KiB
Diff
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commit e014cbba4e16f717807bca88512d2875a1c17ee4
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Author: Mark Wielaard <mark@klomp.org>
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Date: Wed Jun 7 14:05:36 2017 +0200
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strip: Make sure old .shstrab is removed when eu-strip recreates it.
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Although we always recreate the .shstrtab section for the new output
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file we never explicitly assumed it could be removed. It might not be
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possible to remove it when the section string table is shared with
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a symbol table. But if it is removable we should (and recreate it for
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the new section list).
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Regression introduced in commit elfutils-0.163-33-gdf7dfab.
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"Handle merged strtab/shstrtab string tables in strip and unstrip."
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Add extra testcase to explicitly check for this case.
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https://sourceware.org/bugzilla/show_bug.cgi?id=21525
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Signed-off-by: Mark Wielaard <mark@klomp.org>
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diff --git a/src/ChangeLog b/src/ChangeLog
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index cbb77fc..6ac0ef2 100644
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--- a/src/ChangeLog
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+++ b/src/ChangeLog
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@@ -1,3 +1,7 @@
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+2017-06-06 Mark Wielaard <mark@klomp.org>
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+
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+ * strip.c (handle_elf): Assume e_shstrndx section can be removed.
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+
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2017-04-20 Ulf Hermann <ulf.hermann@qt.io>
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* readelf.c: Include strings.h.
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diff --git a/src/strip.c b/src/strip.c
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index f747441..11b2a37 100644
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--- a/src/strip.c
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+++ b/src/strip.c
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@@ -711,11 +711,13 @@ handle_elf (int fd, Elf *elf, const char *prefix, const char *fname,
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in the sh_link or sh_info element it cannot be removed either
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*/
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for (cnt = 1; cnt < shnum; ++cnt)
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- /* Check whether the section can be removed. */
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+ /* Check whether the section can be removed. Since we will create
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+ a new .shstrtab assume it will be removed too. */
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if (remove_shdrs ? !(shdr_info[cnt].shdr.sh_flags & SHF_ALLOC)
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- : ebl_section_strip_p (ebl, ehdr, &shdr_info[cnt].shdr,
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- shdr_info[cnt].name, remove_comment,
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- remove_debug))
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+ : (ebl_section_strip_p (ebl, ehdr, &shdr_info[cnt].shdr,
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+ shdr_info[cnt].name, remove_comment,
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+ remove_debug)
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+ || cnt == ehdr->e_shstrndx))
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{
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/* For now assume this section will be removed. */
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shdr_info[cnt].idx = 0;
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@@ -1062,8 +1064,10 @@ handle_elf (int fd, Elf *elf, const char *prefix, const char *fname,
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}
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/* Test whether we are doing anything at all. */
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- if (cnt == idx)
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- /* Nope, all removable sections are already gone. */
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+ if (cnt == idx
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+ || (cnt == idx + 1 && shdr_info[ehdr->e_shstrndx].idx == 0))
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+ /* Nope, all removable sections are already gone. Or the only section
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+ we would remove is the .shstrtab section which we will add again. */
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goto fail_close;
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/* Create the reference to the file with the debug info. */
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diff --git a/tests/ChangeLog b/tests/ChangeLog
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index 5b0d486..5800946 100644
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--- a/tests/ChangeLog
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+++ b/tests/ChangeLog
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@@ -1,3 +1,7 @@
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+2017-06-06 Mark Wielaard <mark@klomp.org>
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+
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+ * run-strip-test.sh: Test strip -g doesn't introduce extra .shstrtab.
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+
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2017-02-13 Ulf Hermann <ulf.hermann@qt.io>
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Mark Wielaard <mark@klomp.org>
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diff --git a/tests/run-strip-test.sh b/tests/run-strip-test.sh
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index 42aa988..280814e 100755
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--- a/tests/run-strip-test.sh
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+++ b/tests/run-strip-test.sh
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@@ -49,6 +49,14 @@ testrun ${abs_top_builddir}/src/unstrip -o testfile.unstrip testfile.temp testfi
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testrun ${abs_top_builddir}/src/elfcmp --hash-inexact $original testfile.unstrip
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}
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+# test strip -g
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+testrun ${abs_top_builddir}/src/strip -g -o testfile.temp $original
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+
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+# Buggy eu-strip created multiple .shstrtab sections
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+shstrtab_SECS=$(testrun ${abs_top_builddir}/src/readelf -S testfile.temp | grep '.shstrtab' | wc --lines)
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+test $shstrtab_SECS -eq 1 ||
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+ { echo "*** failure not just one '.shstrtab' testfile.temp ($shstrtab_SECS)"; status=1; }
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+
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# Now strip in-place and make sure it is smaller.
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SIZE_original=$(stat -c%s $original)
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testrun ${abs_top_builddir}/src/strip $original
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