Hi,
I would like to call ASM (MASM) from C (GCC). Easy!
Now i would like my asm function to be able to use data and to call functions like printf().
I got two problems: the data section and the call to printf()
I have read examples on internet which are exactly like mine but don't seem to fail. Any help is welcomed.
This problem has been discussed on this forum anyway i can't find a way to compile my executable properly as GCC is also involved.
Thanks to fellow coders.
test.c:
#include <stdio.h>
int64_t asmfunc();
int main() {
asmfunc());
return 0;
}
test.asm:
global asmfunc
section .data
msg: db "a very inspired message!",10,0
section .text
extern printf
asmfunc:
mov edi,msg
xor eax,eax
call printf
ret
compilation:
nasm -felf64 maxofthree.asm
gcc callmaxofthree.c maxofthree.o
result:
/usr/bin/ld: maxofthree.o: relocation R_X86_64_32 against `.data' can not
be used when making a shared object; recompile with -fPIC
if i just leave the printf call, removing the .data section and the "mov edi,msg", i get
/usr/bin/ld: maxofthree.o: relocation R_X86_64_PC32 against symbol
`printf@@GLIBC_2.2.5' can not be used when making a shared object;
recompile with -fPIC
Hope my question will not be considered out of subject, my plan is to code mostly in asm with support of C, not the otherway 
By the way, if someone knows how to use global variable from the C source inside the assembly function, the answered is welcomed too. I'm quite a noob at C, sorry.
Dear
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