On 09/30/14 16:30, Petr Machata wrote:
Hello,
I'm working on support in elfutils for the .debug_macro proposal[1].
The numerical values and semantics of DW_MACINFO_* opcodes are
equivalent to their new-style DW_MACRO_* counterparts. So a decoder
could transparently read in .debug_macro instead of .debug_macinfo, and
serve the opcodes found there to a client, without fear that they get
misinterpreted.
Were it not for DW_MACINFO_vendor_ext, 0xff. This value, in new-style
sections, is part of the vendor extension block, as DW_MACRO_hi_user.
It could be allocated and emitted, and a client would misinterpret it as
DW_MACINFO_vendor_ext, decode it, and make decisions based on this
misinterpretation.
I would therefore like to propose that the opcode 0xff is considered
reserved, and DW_MACRO_hi_user is changed to 0xfe.
Does this sound reasonable? Should I file an issue for this?
[1] http://www.dwarfstd.org/ShowIssue.php?issue=110722.1
Yes, please file a comment.
--
Michael Eager ea...@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
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