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windowsassemblyfasm

Printf crashes in FASM


The following code prints 30967 and crashes.

It is FASM on Windows 7 x86 (32bit).

Could someone please explain to me why it crashes?

format PE console
entry start
include 'win32a.inc'
pos00:
db 10,0,0,0
str2:
db '%d',0
h:
dd -11
aa:
dd 0
start:
goto00:
        invoke GetStdHandle, [h]
        invoke gotoxy,eax,[pos00]
        push dword [aa]
        push str2
        call [printf]
        inc dword [aa]
        jmp start
data import
     library kernel32, 'kernel32.dll', \
             msvcrt, 'msvcrt.dll'
     import kernel32, \
            exit,'ExitProcess',\
            gotoxy, 'SetConsoleCursorPosition',\
            GetStdHandle,'GetStdHandle'
     import msvcrt,\
            printf,'printf'
end data

Solution

  • Fixed:

    format PE console
    entry start
    include 'win32a.inc'
    pos00:
    db 10,0,0,0
    str2:
    db '%d',0
    h:
    dd -11
    aa:
    dd 0
    start:
    goto00:
            invoke GetStdHandle, [h]
            invoke gotoxy,eax,[pos00]
            push dword [aa]
            push str2
            call [printf]
            add esp, 8
            inc dword [aa]
            jmp start
    data import
         library kernel32, 'kernel32.dll', \
                 msvcrt, 'msvcrt.dll'
         import kernel32, \
                exit,'ExitProcess',\
                gotoxy, 'SetConsoleCursorPosition',\
                GetStdHandle,'GetStdHandle'
         import msvcrt,\
                printf,'printf'
    end data