Bug in the terminal description of tw100

[ThorstenOtto]

As recently discovered while testing a new version of gdb, there is a problem in the description of the TW100 emulation that toswin2 uses. The result is that the cursor is sometimes moved to the middle of the window (if it is larger than 25 lines). If you encounter similar issues in curses-based programs, a possible fix is to use

Code: Select all

$ infocmp tw100 | sed 's/ll=\\E\[24H, //' | tic -

This will remove the 'll' (move to lower-left) entry from the description.

Eventually, depending on access rights, the result will be written to $HOME/.terminfo/t/tw100 instead of the system-wide /usr/share/terminfo/t/tw100

[wongck]

sorry off topic.... OH! gdb with TUI I am guessing
So will it work with the old school a.out or the new elf only?

[ThorstenOtto]

With the new elf only (and yes, in --tui mode, not perfect, but nicer than just a commandline). gdb does not support the stabs debug info anymore that is used in a.out, and a.out cannot use dwarf2 because that requires named sections. I also think that a lot of things simply cannot be accurately described in stabs. That also means currently for vincents gcc-13 only.

[mikro]

Which package needs to be updated 'upstream' ? Is it ncurses which contains /usr/share/terminfo/t/tw100 ?

[ThorstenOtto]

Yes, ncurses is the package where the terminfo database comes from (on my system the actual package is named terminfo, but it is built from ncurses sources)

[wongck]

well... I'm still on the older format.
In any case.... Great work !!

[saulot]

@ThorstenOtto: Do you mean that gcc-13 elf version supports / emits dwarfX(2 or newer?) and stabs?

[ThorstenOtto]

No, you cannot mix that. dwarf2 is elf only, and stabs is a.out only. gdb does not support a.out anymore, one of the main reasons why we could not update it for our platform for years.

But i don't want to pass over Vincent here, who did the major work for that stuff, and certainly will make an announcement when it is time to do so. Some things still have to be figured out.

[saulot]

Thanks, I understand this a.out situation. Just thought that if both dwarf/stabs are debugging format, so they could be emitted separately and I thought that they are somewhat independent of executable / library output format. Anyway great news, I'm certainly intersted in further developments of it. One question is dwarf2 good enough, shouldn't be better to use newer standard like dwarf5/6? (I haven't looked into differences though, maybe there are some other reasons for not doing that, v6 is still under development). But I guess I will wait for Vincent...

[ThorstenOtto]

dwarf2 is only the *default* format being used (as on almost all supported targets). You can always use --gdwarf-5 or whatever you need, and is supported by gcc/binutils.

[PeterS]

It might be a good time to announce the mint elf work.