Question

I have an MSVC++ project set up to compile and run assembly code.

In main.c:

#include <stdio.h>

void go() ;

int main()
{
  go() ; // call the asm routine
}

In go.asm:

.586
.model flat, c
.code

go PROC
  invoke puts,"hi"
  RET
go ENDP

end

But when I compile and run, I get an error in go.asm:

error A2006: undefined symbol : puts

How do I define the symbols in <stdio.h> for the .asm files in the project?

Answer 1

Here’s what I have.

It works!!

.586
.model flat,c

printf PROTO C :VARARG  ; The secret sauce.. a prototype of printf

.data
msgHello1 BYTE "GREETINGS AND WELCOME TO EARTH!",0 

.code

go PROC
  push OFFSET msgHello1
  call printf
  add esp, 4 ;  Stack cleaning
  RET
go ENDP

end

• “stack cleaning”
• How to call variadic argument function such as printf