gcc linking error for assembly program

Question

I am trying to execute an assembly program which calculates the roots of a quadratic equation.

nasm -f elf64 assgn10.asm
gcc -o assgn10 assgn10.o

/usr/bin/ld: assgn10.o: relocation R_X86_64_32S against `.bss' can not be used when making a shared object; recompile with -fPIC

/usr/bin/ld: final link failed: Nonrepresentable section on output

collect2: error: ld returned 1 exit status

I have used 2 macros.

%macro myprintf 1
mov rdi,formatpf
sub rsp,8
movsd xmm0,[%1]
mov rax,1
call printf
add rsp,8
syscall
%endmacro

%macro myscanf 1
mov rdi,formatsf
mov rax,0
mov rsi,qword[%1]
call scanf
;syscall
%endmacro

This is how my .bss section looks.

section .bss

a resq 1
b resq 1
c resq 1
b2 resq 1 ; b square
fac resq 1 ; 4ac
delta resq 1 ; delta value
rdelta resq 1 ; root of delta
r1 resq 1 ;root 1
r2 resq 1 ;root 2
ta resq 1  ; 2a
realn resq 1
img1 resq 1
img2 resq 1

The same program worked without fuss on a different PC.

Possible duplicate of 32-bit absolute addresses no longer allowed in x86-64 Linux? — Michael Petch

Employed Russian Employed Russian · Accepted Answer · 2018-04-14T13:53:43

The same program worked without fuss on a different pc.

Your gcc is configured to produce position-independent executables by default (configure --enable-default-pie ...) and your assembly is not compatible with that.

This should work:

gcc -o assgn10 assgn10.o -no-pie

gcc linking error for assembly program

1 Answers