https://sourceware.org/bugzilla/show_bug.cgi?id=23247
--- Comment #2 from Mark Wielaard <mark at klomp dot org> ---
(In reply to Mark Wielaard from comment #1)
> While looking at this I also noticed that for this test file eu-readelf
> --debug-dump=ranges claims to find some unused garbage in .debug_ranges,
> which might indicate that we are either missing some attributes in the
> associated CU, or GCC really puts garbage in the .debug_ranges section
> (which would surprise me).
That is odd. It seems eu-readelf really is correct, there is unused garbage in
the .debug_ranges sections, but not generated by GCC, but by GNU AS:
DWARF section [28] '.debug_info' at offset 0xe3c0:
[Offset]
Compilation unit at offset 0:
Version: 2, Abbreviation section offset: 0, Address size: 8, Offset size: 4
[ b] compile_unit abbrev: 1
stmt_list (data4) 0
ranges (data4) range list [ 0]
name (strp) "../sysdeps/x86_64/crti.S"
comp_dir (strp)
"/home/abuild/rpmbuild/BUILD/glibc-2.27/csu"
producer (strp) "GNU AS 2.30.0"
language (data2) Mips_Assembler (32769)
[...]
Compilation unit at offset 81846:
Version: 2, Abbreviation section offset: 6828, Address size: 8, Offset size: 4
[ 13fc1] compile_unit abbrev: 1
stmt_list (data4) 23645
ranges (data4) range list [ 21a0]
name (strp) "../sysdeps/x86_64/crtn.S"
comp_dir (strp)
"/home/abuild/rpmbuild/BUILD/glibc-2.27/csu"
producer (strp) "GNU AS 2.30.0"
language (data2) Mips_Assembler (32769)
DWARF section [33] '.debug_ranges' at offset 0x3e2b0:
CU [ b] base: +000000000000000000 <ELFUTILS_0.170.90>
[ 0] base address
+000000000000000000 <ELFUTILS_0.170.90>
[ 10] <UNUSED GARBAGE> ... 48 bytes ...
[...]
CU [ 13fc1] base: +000000000000000000 <ELFUTILS_0.170.90>
[ 21a0] base address
+000000000000000000 <ELFUTILS_0.170.90>
[ 21b0] <UNUSED GARBAGE IN REST OF SECTION>
All the other CU/ranges look fine. I assume that GNU AS is padding the section
for some reason. Anyway, this doesn't look like an eu-readelf bug.
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