Hm, I just tried setting a breakpoint at RegOpenKeyExW, and it worked, the list command showed the correct code when the breakpoint was hit.

Also, I noticed that it shows the file/line number when I set a breakpoint on RegOpenKeyExW, but not for BitBlt. Why would that be?

Wine-dbg>break RegOpenKeyExW

Breakpoint 2 at 0x7eb73920 RegOpenKeyExW [/home/sashoalm/Workspace/wine/wine-git/dlls/advapi32/registry.c:461] in advapi32

Wine-dbg>break BitBlt

fixme:dbghelp_dwarf:dwarf2_parse_subprogram Unhandled Tag type 0x1 at ctx(0x32bfec,L"gdi32<elf>"), for debug_info(abbrev:0x15f2148,symt:0x175a660)

Breakpoint 1 at 0x7ebcac00 BitBlt in gdi32