https://sourceware.org/bugzilla/show_bug.cgi?id=27370
Bug ID: 27370
Summary: [readelf] warning when processing abbrev with
DW_FORM_ref_sig8
Product: binutils
Version: 2.37 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
...
$ g++ gdb/testsuite/gdb.cp/cpexprs.cc -gdwarf-5 -fdebug-types-section
$ ~/binutils/install/bin/readelf -w a.out > READELF
readelf: Warning: Unexpected form 20 encountered whilst finding abbreviation
for type
...
The form 20 is actually a hex, so the warning could add a 0x prefix to make
that clear.
The form 0x20 is:
...
DW_FORM (DW_FORM_ref_sig8, 0x20)
...
Putting the warning together with the output, we have:
...
<2><1839>: Abbrev Number: 48 (DW_TAG_member)
<183a> DW_AT_name : (indirect string, offset: 0x2065): _sbuf
<183e> DW_AT_decl_file : 4
<183f> DW_AT_decl_line : 158
<1840> DW_AT_type : <0x1858>readelf: Warning: Unexpected form 20
encountered whilst finding abbreviation for type
<1844> DW_AT_data_member_location: 8
...
and the referenced type looks like:
...
<1><1858>: Abbrev Number: 52 (DW_TAG_pointer_type)
<1859> DW_AT_byte_size : 8
<185a> DW_AT_type : signature: 0xa8df1933f740ec32
...
with abbrev:
...
52 DW_TAG_pointer_type [no children]
DW_AT_byte_size DW_FORM_data1
DW_AT_type DW_FORM_ref_sig8
DW_AT value: 0 DW_FORM value: 0
...
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