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  3. I like how Windows managed the 32bit/64bit migration in the most sensible way, by making us pick from two copies of every installer/binary forever

I like how Windows managed the 32bit/64bit migration in the most sensible way, by making us pick from two copies of every installer/binary forever

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  • foone@digipres.clubF foone@digipres.club

    I like how Windows managed the 32bit/64bit migration in the most sensible way, by making us pick from two copies of every installer/binary forever

    cinebox@masto.hackers.townC This user is from outside of this forum
    cinebox@masto.hackers.townC This user is from outside of this forum
    cinebox@masto.hackers.town
    wrote last edited by
    #11

    @foone don’t forget the software that also has arm64 binaries!

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    • foone@digipres.clubF This user is from outside of this forum
      foone@digipres.clubF This user is from outside of this forum
      foone@digipres.club
      wrote last edited by
      #12

      64bit windows EXE, being run in DOSBox-X:

      Link Preview Image
      foone@digipres.clubF 1 Reply Last reply
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      • foone@digipres.clubF foone@digipres.club

        technically windows does use fat binaries, they're just DOS/windows.

        which is really only ever used to display a "you need windows to run this program" if you accidentally run it in DOS.

        cinebox@masto.hackers.townC This user is from outside of this forum
        cinebox@masto.hackers.townC This user is from outside of this forum
        cinebox@masto.hackers.town
        wrote last edited by
        #13

        @foone surely NTFS binaries are more common these days

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        • foone@digipres.clubF foone@digipres.club

          64bit windows EXE, being run in DOSBox-X:

          Link Preview Image
          foone@digipres.clubF This user is from outside of this forum
          foone@digipres.clubF This user is from outside of this forum
          foone@digipres.club
          wrote last edited by
          #14

          fun fact: although that DOS stub usually just says that and quits, there's nothing that stops it from doing other things.

          You could write a program that runs on DOS and win64, it'd just need to be implemented twice and embedded in the same binary

          foone@digipres.clubF dosnostalgic@mastodon.socialD dryak@mstdn.scienceD kawa@mas.toK 4 Replies Last reply
          0
          • foone@digipres.clubF foone@digipres.club

            technically windows does use fat binaries, they're just DOS/windows.

            which is really only ever used to display a "you need windows to run this program" if you accidentally run it in DOS.

            cr1901@mastodon.socialC This user is from outside of this forum
            cr1901@mastodon.socialC This user is from outside of this forum
            cr1901@mastodon.social
            wrote last edited by
            #15

            @foone I feel like I remember certain Win 3.x binaries also prepending a DOS executable of the same program, so that the same binary runs on both systems.

            But Win 3.x isn't PE. So maybe I'm misremembering.

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            • foone@digipres.clubF foone@digipres.club

              fun fact: although that DOS stub usually just says that and quits, there's nothing that stops it from doing other things.

              You could write a program that runs on DOS and win64, it'd just need to be implemented twice and embedded in the same binary

              foone@digipres.clubF This user is from outside of this forum
              foone@digipres.clubF This user is from outside of this forum
              foone@digipres.club
              wrote last edited by
              #16

              so you could fat-binary a program to run on DOS/win32/win64 this way, by making it a 32bit program which win64 can run though backwards compatibility.

              I'm not sure if you can include win16 though: it won't run the DOS stub, and it'll not be able to run the win32 version.

              Unless you can set up win32s on win16 in such a way that it works in both 16bit windowses (through win32s) and 32bit-native windowses

              max@peering.socialM kathee_hds@tech.lgbtK foone@digipres.clubF jernej__s@infosec.exchangeJ 4 Replies Last reply
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              • foone@digipres.clubF foone@digipres.club

                I wonder if it still does that for 64bit EXEs?

                luna@catgirl.centerL This user is from outside of this forum
                luna@catgirl.centerL This user is from outside of this forum
                luna@catgirl.center
                wrote last edited by
                #17

                @foone@digipres.club it's even still a thing in arm64 exes (iirc with an x86 dos stub) and bootmgfw.efi, even though no reasonable person will ever try to run those on dos

                luna@catgirl.centerL 1 Reply Last reply
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                • dalias@hachyderm.ioD dalias@hachyderm.io

                  @foone But you *can* use that for so much more.... 😈

                  gsuberland@chaos.socialG This user is from outside of this forum
                  gsuberland@chaos.socialG This user is from outside of this forum
                  gsuberland@chaos.social
                  wrote last edited by
                  #18

                  @dalias @foone I wrote a really evil CTF challenge where the Windows part was pure misdirection, it had tons of nasty anti-analysis stuff, sent people on a runaround chasing down endless threads, and the flag wasn't in there at all. if you ran it under DOS it printed the flag.

                  foone@digipres.clubF 1 Reply Last reply
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                  • gsuberland@chaos.socialG gsuberland@chaos.social

                    @dalias @foone I wrote a really evil CTF challenge where the Windows part was pure misdirection, it had tons of nasty anti-analysis stuff, sent people on a runaround chasing down endless threads, and the flag wasn't in there at all. if you ran it under DOS it printed the flag.

                    foone@digipres.clubF This user is from outside of this forum
                    foone@digipres.clubF This user is from outside of this forum
                    foone@digipres.club
                    wrote last edited by
                    #19

                    @gsuberland @dalias nasty

                    1 Reply Last reply
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                    • foone@digipres.clubF foone@digipres.club

                      so you could fat-binary a program to run on DOS/win32/win64 this way, by making it a 32bit program which win64 can run though backwards compatibility.

                      I'm not sure if you can include win16 though: it won't run the DOS stub, and it'll not be able to run the win32 version.

                      Unless you can set up win32s on win16 in such a way that it works in both 16bit windowses (through win32s) and 32bit-native windowses

                      max@peering.socialM This user is from outside of this forum
                      max@peering.socialM This user is from outside of this forum
                      max@peering.social
                      wrote last edited by
                      #20

                      RE: https://digipres.club/@foone/116195447625031209

                      @foone Does ARM somehow also fit in?

                      foone@digipres.clubF jernej__s@infosec.exchangeJ snowfox@tech.lgbtS 3 Replies Last reply
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                      • foone@digipres.clubF foone@digipres.club

                        so you could fat-binary a program to run on DOS/win32/win64 this way, by making it a 32bit program which win64 can run though backwards compatibility.

                        I'm not sure if you can include win16 though: it won't run the DOS stub, and it'll not be able to run the win32 version.

                        Unless you can set up win32s on win16 in such a way that it works in both 16bit windowses (through win32s) and 32bit-native windowses

                        kathee_hds@tech.lgbtK This user is from outside of this forum
                        kathee_hds@tech.lgbtK This user is from outside of this forum
                        kathee_hds@tech.lgbt
                        wrote last edited by
                        #21

                        @foone but fat as it is tall and with tits to match or are we being cowards?

                        foone@digipres.clubF 1 Reply Last reply
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                        • kathee_hds@tech.lgbtK kathee_hds@tech.lgbt

                          @foone but fat as it is tall and with tits to match or are we being cowards?

                          foone@digipres.clubF This user is from outside of this forum
                          foone@digipres.clubF This user is from outside of this forum
                          foone@digipres.club
                          wrote last edited by
                          #22

                          @Kathee_HDS ROUGE.EXE!

                          kathee_hds@tech.lgbtK 1 Reply Last reply
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                          • foone@digipres.clubF foone@digipres.club

                            fun fact: although that DOS stub usually just says that and quits, there's nothing that stops it from doing other things.

                            You could write a program that runs on DOS and win64, it'd just need to be implemented twice and embedded in the same binary

                            dosnostalgic@mastodon.socialD This user is from outside of this forum
                            dosnostalgic@mastodon.socialD This user is from outside of this forum
                            dosnostalgic@mastodon.social
                            wrote last edited by
                            #23

                            @foone An example of this is Bleep!, an NSF player for DOS/Win32
                            https://www.zophar.net/utilities/audio-multi/bleep-.html

                            whophd@ioc.exchangeW 1 Reply Last reply
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                            • luna@catgirl.centerL luna@catgirl.center

                              @foone@digipres.club it's even still a thing in arm64 exes (iirc with an x86 dos stub) and bootmgfw.efi, even though no reasonable person will ever try to run those on dos

                              luna@catgirl.centerL This user is from outside of this forum
                              luna@catgirl.centerL This user is from outside of this forum
                              luna@catgirl.center
                              wrote last edited by
                              #24

                              @foone@digipres.club the .efi file for systemd-boot on my system doesn't include a dos stub though, so that's why i specifically said bootmgfw.efi

                              1 Reply Last reply
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                              • foone@digipres.clubF foone@digipres.club

                                so you could fat-binary a program to run on DOS/win32/win64 this way, by making it a 32bit program which win64 can run though backwards compatibility.

                                I'm not sure if you can include win16 though: it won't run the DOS stub, and it'll not be able to run the win32 version.

                                Unless you can set up win32s on win16 in such a way that it works in both 16bit windowses (through win32s) and 32bit-native windowses

                                foone@digipres.clubF This user is from outside of this forum
                                foone@digipres.clubF This user is from outside of this forum
                                foone@digipres.club
                                wrote last edited by
                                #25

                                Anatoly Shashkin💾 (@dosnostalgic@mastodon.social)

                                @foone@digipres.club An example of this is Bleep!, an NSF player for DOS/Win32 https://www.zophar.net/utilities/audio-multi/bleep-.html

                                favicon

                                Mastodon (mastodon.social)

                                jernej__s@infosec.exchangeJ 1 Reply Last reply
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                                • max@peering.socialM max@peering.social

                                  RE: https://digipres.club/@foone/116195447625031209

                                  @foone Does ARM somehow also fit in?

                                  foone@digipres.clubF This user is from outside of this forum
                                  foone@digipres.clubF This user is from outside of this forum
                                  foone@digipres.club
                                  wrote last edited by
                                  #26

                                  @max presumably but I know nothing about windows-on-ARM, I don't believe in it.

                                  1 Reply Last reply
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                                  • foone@digipres.clubF foone@digipres.club

                                    fun fact: although that DOS stub usually just says that and quits, there's nothing that stops it from doing other things.

                                    You could write a program that runs on DOS and win64, it'd just need to be implemented twice and embedded in the same binary

                                    dryak@mstdn.scienceD This user is from outside of this forum
                                    dryak@mstdn.scienceD This user is from outside of this forum
                                    dryak@mstdn.science
                                    wrote last edited by
                                    #27

                                    @foone that was the whole shtick of the HX DOS Extender.

                                    The DOS stub could start it, and in turn that extender supports enough Win32 API to allow some limited software to run.

                                    And I think I vaguely remember some other software doing crazy stuff with their DOS stubs.

                                    1 Reply Last reply
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                                    • foone@digipres.clubF foone@digipres.club

                                      fun fact: although that DOS stub usually just says that and quits, there's nothing that stops it from doing other things.

                                      You could write a program that runs on DOS and win64, it'd just need to be implemented twice and embedded in the same binary

                                      kawa@mas.toK This user is from outside of this forum
                                      kawa@mas.toK This user is from outside of this forum
                                      kawa@mas.to
                                      wrote last edited by
                                      #28

                                      @foone I remember Visual Basic 3.0 "correcting" by trying to run Windows, and telling Windows to run VB in turn on startup.

                                      1 Reply Last reply
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                                      • foone@digipres.clubF foone@digipres.club

                                        I wonder if it still does that for 64bit EXEs?

                                        jernej__s@infosec.exchangeJ This user is from outside of this forum
                                        jernej__s@infosec.exchangeJ This user is from outside of this forum
                                        jernej__s@infosec.exchange
                                        wrote last edited by
                                        #29

                                        @foone Not just 64-bit EXEs, EFI binaries also usually (but not always) contain the DOS stub.

                                        1 Reply Last reply
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                                        • foone@digipres.clubF foone@digipres.club

                                          I know programmers who use fat binaries and they're all cowards

                                          mxk@hachyderm.ioM This user is from outside of this forum
                                          mxk@hachyderm.ioM This user is from outside of this forum
                                          mxk@hachyderm.io
                                          wrote last edited by
                                          #30

                                          @foone my favorite type of fat binaries probably are cosmopolitan libc/ape binaries.
                                          I find it fascinating and entertaining but note that I don't think it's an actual good idea.
                                          https://justine.lol/cosmopolitan/index.html

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