There is --unstripped but that is whether the ELF file can be stripped
(further) by removing any .[z]debug_* sections or symbol table
(.symtab section). The --has-debug-sections option only checks
whether there are .[z]debug sections present.
* src/elfclassify.c (is_has_debug_sections): New function.
(enum classify_check): Add classify_has_debug_sections.
(check_checks): Add and print (if verbose)
classify_has_debug_sections value.
(main): Add ar-member to options. Update argp.doc to explain
different debug options (--unstripped, --has-debug-section and
--debug-only).
* tests/run-elfclassify.sh: Add various --has-debug-sections
tests.
Signed-off-by: Mark Wielaard <m...@klomp.org>
---
src/elfclassify.c | 25 +++++++++++++++++++++++++
tests/run-elfclassify.sh | 25 +++++++++++++++++++++++++
2 files changed, 50 insertions(+)
diff --git a/src/elfclassify.c b/src/elfclassify.c
index 311530d74dd8..fd84f90dda9f 100644
--- a/src/elfclassify.c
+++ b/src/elfclassify.c
@@ -472,6 +472,16 @@ is_unstripped (void)
&& (has_symtab || has_debug_sections);
}
+/* Return true if the file is an ELF file which has .debug_* sections
+ (note that a symtab is not considered a debug section). */
+static bool
+is_has_debug_sections (void)
+{
+ return elf_kind (elf) != ELF_K_NONE
+ && (elf_type == ET_REL || elf_type == ET_EXEC || elf_type == ET_DYN)
+ && has_debug_sections;
+}
+
/* Return true if the file contains only debuginfo, but no loadable
program bits. Then it is most likely a separate .debug file, a dwz
multi-file or a .dwo file. Note that it can still be loadable,
@@ -625,6 +635,7 @@ enum classify_check
classify_elf_archive,
classify_core,
classify_unstripped,
+ classify_has_debug_sections,
classify_executable,
classify_program,
classify_shared,
@@ -753,6 +764,7 @@ check_checks ()
[classify_elf_archive] = is_elf_archive (),
[classify_core] = is_core (),
[classify_unstripped] = is_unstripped (),
+ [classify_has_debug_sections] = is_has_debug_sections (),
[classify_executable] = is_executable (),
[classify_program] = is_program (),
[classify_shared] = is_shared (),
@@ -774,6 +786,8 @@ check_checks ()
fprintf (stderr, "debug: %s: core\n", current_path);
if (checks[classify_unstripped])
fprintf (stderr, "debug: %s: unstripped\n", current_path);
+ if (checks[classify_has_debug_sections])
+ fprintf (stderr, "debug: %s: has_debug_sections\n", current_path);
if (checks[classify_executable])
fprintf (stderr, "debug: %s: executable\n", current_path);
if (checks[classify_program])
@@ -991,6 +1005,8 @@ main (int argc, char **argv)
{ "unstripped", classify_check_offset + classify_unstripped, NULL, 0,
N_("File is an ELF file with symbol table or .debug_* sections \
and can be stripped further"), 1 },
+ { "has-debug-sections", classify_check_offset +
classify_has_debug_sections, NULL, 0,
+ N_("File is an ELF file with .debug_* sections"), 1 },
{ "executable", classify_check_offset + classify_executable, NULL, 0,
N_("File is (primarily) an ELF program executable \
(not primarily a DSO)"), 1 },
@@ -1023,6 +1039,8 @@ and can be stripped further"), 1 },
NULL, OPTION_HIDDEN, NULL, 1 },
{ "not-unstripped", classify_check_not_offset + classify_unstripped,
NULL, OPTION_HIDDEN, NULL, 1 },
+ { "not-has-debug-sections", classify_check_not_offset +
classify_has_debug_sections,
+ NULL, OPTION_HIDDEN, NULL, 1 },
{ "not-executable", classify_check_not_offset + classify_executable,
NULL, OPTION_HIDDEN, NULL, 1 },
{ "not-program", classify_check_not_offset + classify_program,
@@ -1105,6 +1123,13 @@ or library) use --loadable. Note that files that only
contain \
though they might contain program headers). Linux kernel modules are \
also not --loadable (in the normal sense).\
\n\n\
+Detecting whether an ELF file can be stripped, because it has .[z]debug_* \
+sections and/or a symbol table (.symtab) is done with --unstripped. \
+To detect whether an ELF file just has .[z]debug_* sections use \
+--has-debug-section. Use --debug-only to detect ELF files that contain \
+only debuginfo (possibly just a .symtab), but no loadable program bits \
+(like separate .debug files, dwz multi-files or .dwo files).\
+\n\n\
Without any of the --print options, the program exits with status 0 \
if the requested checks pass for all input files, with 1 if a check \
fails for any file, and 2 if there is an environmental issue (such \
diff --git a/tests/run-elfclassify.sh b/tests/run-elfclassify.sh
index a9b4ad764c02..7835fc973b27 100755
--- a/tests/run-elfclassify.sh
+++ b/tests/run-elfclassify.sh
@@ -254,6 +254,12 @@ testrun_compare ${abs_top_builddir}/src/elfclassify
--unstripped --print $kmod_f
$(echo $kmod_files | sed -e "s/ /\n/g")
EOF
+echo "kmods are have debug sections"
+testrun ${abs_top_builddir}/src/elfclassify --has-debug-sections $kmod_files
+testrun_compare ${abs_top_builddir}/src/elfclassify --has-debug-sections
--print $kmod_files <<EOF
+$(echo $kmod_files | sed -e "s/ /\n/g")
+EOF
+
echo "kmods are not debug-only"
testrun ${abs_top_builddir}/src/elfclassify --not-debug-only $kmod_files
testrun_compare ${abs_top_builddir}/src/elfclassify --not-debug-only --print
$kmod_files <<EOF
@@ -299,6 +305,12 @@ testrun_compare ${abs_top_builddir}/src/elfclassify
--unstripped --print $debug_
$(echo $debug_files | sed -e "s/ /\n/g")
EOF
+echo "debug-only files have debug sections"
+testrun ${abs_top_builddir}/src/elfclassify --has-debug-sections $debug_files
+testrun_compare ${abs_top_builddir}/src/elfclassify --has-debug-sections
--print $debug_files <<EOF
+$(echo $debug_files | sed -e "s/ /\n/g")
+EOF
+
echo "debug-only files are not programs"
testrun ${abs_top_builddir}/src/elfclassify --not-program $debug_files
testrun_compare ${abs_top_builddir}/src/elfclassify --not-program --print
$debug_files <<EOF
@@ -352,3 +364,16 @@ echo "any-ar-member not-executable"
testrun_compare ${abs_top_builddir}/src/elfclassify --any-ar-member
--not-executable --print testarchive64.a test-ar-duplicates.a <<EOF
testarchive64.a
EOF
+
+echo "any-ar-member has-debug-sections"
+# Neither has members with actual debug sections. They both do have
+# members that have symtab so are unstripped (see above).
+testrun_compare ${abs_top_builddir}/src/elfclassify --any-ar-member
--has-debug-sections --print testarchive64.a test-ar-duplicates.a <<EOF
+EOF
+
+echo "any-ar-member not-has-debug-sections"
+# Noth match (opposite of above)
+testrun_compare ${abs_top_builddir}/src/elfclassify --any-ar-member
--not-has-debug-sections --print testarchive64.a test-ar-duplicates.a <<EOF
+testarchive64.a
+test-ar-duplicates.a
+EOF
--
2.50.1
