Although I've already created public comments for (most of) this, Michael Eager suggested that I post my questions regarding DWARF pieces on this list (again).
All of these questions are related to the definition of DW_OP_piece and DW_OP_bit_piece: * Is "DW_OP_piece(n)" equivalent to "DW_OP_bit_piece(8*n, 0)"? * What is the correct placement rule for register pieces? ABI-defined or lsb0-ordered? If lsb0-ordered, how exactly is that order defined for non-integer registers? * Shall DW_OP_bit_piece ignore the offset for stack- and implicit values? * What is the "least significant bit" of an implicit value? And is it intentional that the placement rule differs between implicit- and memory values? * Some DWARF producers describe a register pair just with a single DW_OP_reg<n>. Can a register piece reach into the next register like that as well? * Is "DW_OP_reg*" followed by "DW_OP_piece(size of object type)" always equivalent to omitting the piece operation? -- Andreas _______________________________________________ Dwarf-Discuss mailing list Dwarf-Discuss@lists.dwarfstd.org http://lists.dwarfstd.org/listinfo.cgi/dwarf-discuss-dwarfstd.org
