This is the disassembly of a very simple C program (strcpy() a constant string and print it):

No symbol table is loaded.  Use the "file" command.
Reading symbols from string...done.
(gdb) break 6
Breakpoint 1 at 0x6b8: file string.c, line 6.
(gdb) break 7
Breakpoint 2 at 0x6f2: file string.c, line 7.
(gdb) r
Starting program: /home/wsllnx/Detached/string

Breakpoint 1, main () at string.c:6
6               strcpy(buf, "Memento Mori\n\tInjected_string");
(gdb) disass main
Dump of assembler code for function main:
0x00005555554006b0 < 0>:     push   %rbp
0x00005555554006b1 < 1>:     mov    %rsp,%rbp
0x00005555554006b4 < 4>:     sub    $0x70,%rsp
0x00005555554006b8 < 8>:     lea    -0x70(%rbp),%rax
0x00005555554006bc < 12>:    movabs $0x206f746e656d654d,%rdx
0x00005555554006c6 < 22>:    mov    %rdx,(%rax)
0x00005555554006c9 < 25>:    movabs $0x6e49090a69726f4d,%rcx
0x00005555554006d3 < 35>:    mov    %rcx,0x8(%rax)
0x00005555554006d7 < 39>:    movabs $0x735f64657463656a,%rsi
0x00005555554006e1 < 49>:    mov    %rsi,0x10(%rax)
0x00005555554006e5 < 53>:    movl   $0x6e697274,0x18(%rax)
0x00005555554006ec < 60>:    movw   $0x67,0x1c(%rax)
0x00005555554006f2 < 66>:    lea    -0x70(%rbp),%rax
0x00005555554006f6 < 70>:    mov    %rax,%rdi
0x00005555554006f9 < 73>:    mov    $0x0,