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The DWARF specification documents an optional index section called ‘.debug_names’. ROCGDB can both read and create this section. However, in order to work with ROCGDB, some extensions were necessary.
ROCGDB uses the augmentation string ‘GDB2’. Earlier versions used the string ‘GDB’, but these versions of the index are no longer supported.
ROCGDB does not use the specified hash table. Therefore, because this hash table is optional, ROCGDB also does not write it.
ROCGDB also generates and uses some extra index attributes:
DW_IDX_GNU_internalThis has the value ‘0x2000’. It is a flag that, when set,
indicates that the associated entry has static linkage.
DW_IDX_GNU_mainThis has the value ‘0x2002’. It is a flag that, when set,
indicates that the associated entry is the program’s main.
DW_IDX_GNU_languageThis has the value ‘0x2003’. It is a ‘DW_LANG_’ constant, indicating the language of the associated entry.
DW_IDX_GNU_linkage_nameThis has the value ‘0x2004’. It is a flag that, when set, indicates that the associated entry is a linkage name, and not a source name.