http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50299
--- Comment #3 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2011-09-07 10:57:36 UTC --- <2><7d>: Abbrev Number: 6 (DW_TAG_formal_parameter) <7e> DW_AT_name : s <86> DW_AT_location : 2 byte block: 91 60 (DW_OP_fbreg: -32) vs. 24: bf 01 00 00 00 mov $0x1,%edi 29: be 02 00 00 00 mov $0x2,%esi 2e: e8 00 00 00 00 callq 33 <bar+0x13> I do not see debug info supported even for normal values, therefore it is irrelevant to discuss the entry values.