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Thread: Mem_mapped Segment???

  1. Oct 15th, 2002, 04:38 PM #1
    Cmdr0Sunburn
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    Mem_mapped Segment???

    how do i make a MEM_MAPPED SEGMENT in msvc++????
    I know a lot oF Vb, expert in C++, and i think in assembly.
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  2. Oct 15th, 2002, 04:49 PM #2
    parksie
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    You don't have segments in 32-bit programming.

    What are you trying to do? Map a file to memory?
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  3. Oct 15th, 2002, 05:11 PM #3
    Cmdr0Sunburn
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    lol windows exes have segments, .data. text etc. neve rmind about this i got the question answerd by some one else

    #pragma data_seg (".MYSEG")
    int CrcAlreadyFilled = 0;
    char CRCtable[256] = "";
    #pragma data_seg()
    //linker
    /SECTION:.MYSEG,RWS
    I know a lot oF Vb, expert in C++, and i think in assembly.
    MSVC++6.NET
    vb6
    masm
    Windowz Xp
    I find my self using this a lot in C++

    __asm {
    }
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  4. Oct 16th, 2002, 08:48 AM #4
    CornedBee
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    Parksie: don't confuse memory segments with executable segments.
    All the buzzt
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  6. Oct 16th, 2002, 01:04 PM #5
    parksie
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    Originally posted by CornedBee
    Parksie: don't confuse memory segments with executable segments.
    I thought they were called sections.

    Code:
    $ man ld
    ...
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  7. Oct 16th, 2002, 01:07 PM #6
    parksie
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    Meh

    http://www.linuxbase.org/spec/gLSB/g...lsections.html

    http://www.enchantedlearning.com/spa...ecutable.shtml

    Oh well...
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  8. Oct 16th, 2002, 04:20 PM #7
    Cmdr0Sunburn
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    lol the exe is in memory.... and memory_mapped explanes it all that its windows, and i said segment, windows doesnt have segments, so only thing left is exe segemnts, use your brain.(no offence)
    I know a lot oF Vb, expert in C++, and i think in assembly.
    MSVC++6.NET
    vb6
    masm
    Windowz Xp
    I find my self using this a lot in C++

    __asm {
    }
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  9. Oct 16th, 2002, 04:24 PM #8
    CornedBee
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    Protected mode and therefore windows still know memory segment, but not in the 16-bit way. They are an essential part of multitasking and permission handling.
    All the buzzt
    CornedBee

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  11. Oct 16th, 2002, 04:31 PM #9
    Cmdr0Sunburn
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    yes but that wasnt my Qusestion. and you cant access any other 32bit segs from ring3, and this didnt say vxd any where. but oh well i found my solution to my problem, and ill state more clearly next time. so just let it die.
    Last edited by Cmdr0Sunburn; Oct 16th, 2002 at 04:35 PM.
    I know a lot oF Vb, expert in C++, and i think in assembly.
    MSVC++6.NET
    vb6
    masm
    Windowz Xp
    I find my self using this a lot in C++

    __asm {
    }
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  12. Oct 16th, 2002, 04:39 PM #10
    CornedBee
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    You said windows doesn't have segments, which is wrong.
    All the buzzt
    CornedBee

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  13. Oct 16th, 2002, 07:11 PM #11
    parksie
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    Originally posted by CornedBee
    You said windows doesn't have segments, which is wrong.
    Depends on the type of segments. In real mode, the processor can run in segmentffset mode (16-bit segment and 20-bit offset, or something, I never really did much in 16-bit) but Windows (NT and up at least) tries to avoid it, so it runs in protected mode, whereby the processor and its MMU are responsible for generating a hardware interrupt if you access memory you're not entitled to.
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  14. Oct 16th, 2002, 08:01 PM #12
    Cmdr0Sunburn
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    Originally posted by CornedBee
    You said windows doesn't have segments, which is wrong.
    you cant access segments from normal windows. so it almost like it doesnt even have any.
    but a vxd or some ring0 you can, but normal windows is ring3.
    I know a lot oF Vb, expert in C++, and i think in assembly.
    MSVC++6.NET
    vb6
    masm
    Windowz Xp
    I find my self using this a lot in C++

    __asm {
    }
    Reply With Quote Reply With Quote
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