[Dwarf-Discuss] DW_LNS_set_isa usage

[Wim Lewis]

On Jun 17, 2010, at 5:16 PM, Cary Coutant wrote:
> The only target I know of that actually mixes two ISAs is arm, where
> the assembler places local symbols so that external tools can tell the
> difference between arm and thumb mode. I don't believe that they use
> the isa field of the line number table for this at all.

I don't know if it's generated or used by any actual existing software, but the ARM DWARF document does specify its use (ISA 0=unknown, 1=thumb, 2=ARM):
    http://infocenter.arm.com/help/topic/com.arm.doc.ihi0040a/IHI0040A_aadwarf.pdf