http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #1 from Tom Tromey <tromey at gcc dot gnu.org> 2013-01-24 20:24:18
UTC ---
It seems that I read the wrong frame info in my original report.
However, the bug still exists. Here is a new and hopefully more
correct example showing the bug.
I used a relatively recent git master gcc for this.
I just followed the directions in the original report.
The static link info for 'nested':
<aa> DW_AT_static_link : 1 byte block: 50 (DW_OP_reg0 (rax))
In the 'nested' frame this is:
(gdb) p/x $rax
$1 = 0x7fffffffe370
In the outer 'nestee' frame:
(gdb) p $pc
$2 = (void (*)()) 0x4004e9 <nestee+99>
The frame info as shown by readelf --debug-dump=frames-interp:
00000060 00000024 00000064 FDE cie=00000000 pc=00400486..004004fe
LOC CFA rbx rbp ra
0000000000400486 rsp+8 u u c-8
0000000000400487 rsp+16 u c-16 c-8
000000000040048a rbp+16 u c-16 c-8
000000000040048f rbp+16 c-24 c-16 c-8 <--- this row
00000000004004fd rsp+8 c-24 c-16 c-8
So the CFA we want is $rbp + 16 in the outermost 'nestee' frame:
(gdb) p/x $rbp + 16
$3 = 0x7fffffffe3b0
... but this is different from $1.
