Can I bind .asm files containing x64 assembly code to my c++ project?

KratzKatz

Hello,
I've been looking for a good way to create GUIs with c++ and x64 assembly. Everything works great so far except that I could not figure out how to bind a .asm file containing x64 assembly code to my project.
Does anyone know how to do this?

kshegunov

No it is not. Have you read the documentation carefully? It should look something like:

ASM_FILES += asm.s

asm_cl.output  = ${QMAKE_FILE_OUT}
asm_cl.commands = ml /c /Cx /coff /Fo${QMAKE_FILE_OUT} ${QMAKE_FILE_NAME}
asm_cl.input = ASM_FILES
asm_cl.variable_out = OBJECTS

QMAKE_EXTRA_COMPILERS += asm_cl

SGaist

Hi,

I haven't tried it but did you add your assembler files to the SOURCES variable ?

KratzKatz

Sorry for late reply.
Yes, I think I did. But I don't think I've done it properly.
.pro:

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = test---
TEMPLATE = app

DEFINES += QT_DEPRECATED_WARNINGS

SOURCES += main.cpp\
        mainwindow.cpp\
        asm.o

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

DISTFILES += \
    asm.o

LIBS += asm.o

.mainWindow.cpp:

//some code
extern "C" __int64 assembly();
//some code
void MainWindow::on_pushButton_clicked()
{
    QString s = QString::number(assembly()); // compiling fails here
    ui->label_2->setText(s);
}

asm.o:

.code
assembly proc

mov rax, 1
ret

xor rax, rax

assembly endp
end

I get an error message stating that the object "assembly" cannot be found

SGaist

What OS are you running ?
What compiler are you using ?

kshegunov

@KratzKatz said in Can I bind .asm files containing x64 assembly code to my c++ project?:

Have you compiled your assembly file? You can't link text files ... Also this:

LIBS += asm.o

doesn't look right.

KratzKatz

@SGaist Windows 10 on my Laptop, Windows 7 on my tower and school's computer.
The compiler I'm using is Desktop_Qt_5_8_0_MSVC2015_64bit.

@kshegunov "LIBS += asm.o" was just an attempt on getting things to work. I have it now commented out

kshegunov

As I said, you have to compile the assembly file. For that to happen in QtCreator you need to add an extra compiler and after that add the resulting object files to the OBJECTS qmake variable, so the linker will put it all together. Your asm compiler for VS is called ml (see here - the second post - for a long explanation of what switches you might need).

KratzKatz

@kshegunov is this the right way?:

SOURCES += main.cpp\
        mainwindow.cpp\
        asm.s

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui


new_moc.output  = moc_${QMAKE_FILE_BASE}.cpp
new_moc.commands = moc ${QMAKE_FILE_NAME} -o ${QMAKE_FILE_OUT}
new_moc.depend_command = g++ -E -M ${QMAKE_FILE_NAME} | sed "s,^.*: ,,"
new_moc.input = NEW_HEADERS
QMAKE_EXTRA_COMPILERS += new_moc
OBJECTS += asm.s
input = asm.s
output = asm.bin

But still no compilation. I do know how to compile assembly code to an .exe in VS, but I don't want to use it for GUI programming. But does this mean I can compile my assembly file with VS and link it to my QT project?

kshegunov

No it is not. Have you read the documentation carefully? It should look something like:

ASM_FILES += asm.s

asm_cl.output  = ${QMAKE_FILE_OUT}
asm_cl.commands = ml /c /Cx /coff /Fo${QMAKE_FILE_OUT} ${QMAKE_FILE_NAME}
asm_cl.input = ASM_FILES
asm_cl.variable_out = OBJECTS

QMAKE_EXTRA_COMPILERS += asm_cl