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Old 08-12-2017, 03:23 PM   #1
Fractal Cat
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Registered: Jul 2017
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Question c header file to assembler header file


Is there a tool that will take a C/C++ header file and convert it into an assembler header file ?

Old 08-12-2017, 05:26 PM   #2
Registered: Sep 2011
Posts: 253

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Hi Fractal Cat,

AFAIK, in principle, this a general purpose Programming forum, not specific to any Operating System, or compiling environment. So you might want to consider providing some details about what OS, what compiler, possibly even what CPU you would be using, and in what form you wish a C header converted to an Assembly language header.

For example, on Linux for x86_64 "architecture",

# include <stdio.h>

int two_plus_two()
    return  2  +  2 ;  
# include "header.h"

void main(  int  argc ,  char *arv[]  )
    printf(  "2 + 2 = %d\n" ,  two_plus_two() ) ;
Output from running header_to_asm executable after building with gcc:
2 + 2 = 4
I believe using the gcc compiler driver, Assembly language code is generated from C code, then run through the Assembler and the resulting Object files, through the linker. If it's desired, the compiler driver option "-S" can be used to get the intermediate assembly language output, and stop the build at that point in the build prodecure. Since in C, a header might contain just about anything that a non-header could contain, and the intermediate Assembly language output is available, you could potentially turn the intermediate Assembly language output into a header fairly easily.

On the other hand, there are various ARM environments in which I believe that Assembly language output can be generated and kept for later use as a part of the normal executable build procedure without stopping the build at that point, and there are even ARM environments that allow the use of C language includes directly in Assembly language; there isn't necessarily a need to convert headers from C to Assembly language.

Overall, it might be fair to say that the answer to your question might be different depending on the environment in which, and to consider possible cross-compiling, for which, you wish to compile.


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