This is the mail archive of the mailing list for the elfutils project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [PATCH] Handle GNU extension opcodes in dwarf_getlocation


Thanks for double checking. Adding Jakub to CC, see below.

On Wed, 2012-10-10 at 08:56 +0200, Petr Machata wrote:
> Jan Kratochvil <> writes:
> > On Tue, 09 Oct 2012 22:50:20 +0200, Petr Machata wrote:
> >> Mark Wielaard <> writes:
> >> > Do you happen to know where
> >> > DW_OP_GNU_reinterpret is described, I assumed it was part of
> >> > but it isn't in there.
> >> 
> >> No, it isn't, I didn't find it anywhere else but in elfutils.  It's not
> >> even in my test binary, only DW_OP_GNU_convert is.
> >
> > DW_OP_GNU_convert is handled by GDB:
> As well as DW_OP_GNU_reinterpret, great:
> 	.byte	0xf7	# DW_OP_GNU_convert
> 	.uleb128 0x29
> 	.byte	0xf9	# DW_OP_GNU_reinterpret
> 	.uleb128 0x37
> So yeah, they both have the same arguments.

OK, and I just found gcc/dwarf2out.c does indeed seem to generate it.
But I am not fully clear on why convert cannot always be used.
Jakub, is there a "official" description for DW_OP_GNU_reinterpret?
And/Or is there a newer document describing the typed DWARF stack



Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]