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[ASM & Hex✓] call asm from asm routine

jbmaster21

25
Posts
6
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    • Seen Apr 18, 2020
    is calling asm from asm routine possible, i mean in scripting we use callasm is it possible in compiling asm?
     
    mgriffin

    mgriffin

    1,403
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    10
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    • Seen Apr 29, 2024
    Althurdinok said:
    Just use instruction 'B{condition} <address>', I suppose.
    Click to expand...

    Or maybe you'll want "BL{condition} <address>" so that the CPU knows where to return to (or I guess you could manually set the LR before branching)?

    Anyway, I'm just guessing based on GBATEK, Althurdinok probably knows better than I do :)
     

    Althurdinok

    2
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    5
    Years
    • mgriffin said:
    Or maybe you'll want "BL{condition} <address>" so that the CPU knows where to return to (or I guess you could manually set the LR before branching)?

    Anyway, I'm just guessing based on GBATEK, Althurdinok probably knows better than I do :)
    Click to expand...

    I'm new to asm as well :D. That's proper that BL is more often used. {condition} of branch includes L, XL, X, EQ, NE, etc.
    BL provides return,
    BX allows switching between arm and thumb mode....
    All these can be found by searching for documents on ARM instruction, though I just can't master them all now. :)
     
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