[gem5-users] How to redirect the fopen to open a different file instead of specifed filename in the program binary given as input to gem5 simulator in SE mode

[gogineni kailashnath via gem5-users]

Hello,

I have a C code, which creates a file *file.txt* and prints the hello world
content in the file.

#include<stdio.h>

    int main () {
       FILE *fp;
       char str[] = "Hello world";

       fp = fopen( "file.txt" , "w" );
       fwrite(str , 1 , sizeof(str) , fp );

       fclose(fp);

       return(0);
    }

This binary is compiled in a static form My question is that, since I'm
using a gem5 simulator in syscall emulation mode. I'm working on linux
system.

In the hardware level, since we only know the instructions, for example if
the binary has to open *file.txt*, how can I redirect it to open a
different file (say *hello.txt*, i.e., for any filename specified, it
should just trigger hello.txt). Any help would be appreciated.
Thanks!

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