View memory content with gdb

Hi,
With a simple strcpy code for copying an array, I want to view the memory map with gdb. However, the result I see is not what I expect.

The code is
  char buffer[10];
  strcpy( buffer, argv[ 1 ] );

and I compiled with 


gcc - g -fno-stack-protector -o myco myco.c


I ran gdb commands to 1) set breakpoint, 2) run with an argument "aaaaaaaaaa", 3) check register content to find the memory location, 3) view memory content, 4) continue to copy the argument to memory and 5) view memory content.
I expected to see the ascii code of 'a' multiple times. But I didn't see that. Please see the full output below:

(gdb) break 1
Breakpoint 1 at 0x6bf: file myco.c, line 1.
(gdb) run aaaaaaaaaa
Starting program: /home/mahmood/myco aaaaaaaaaa

Breakpoint 1, main (argc=2, argv=0x7fffffffdf28) at myco.c:6
6      strcpy( buffer, argv[ 1 ] );
(gdb) disas main
Dump of assembler code for function main:
   0x00005555555546b0 <+0>:    push   %rbp
   0x00005555555546b1 <+1>:    mov    %rsp,%rbp
   0x00005555555546b4 <+4>:    sub    $0x20,%rsp
   0x00005555555546b8 <+8>:    mov    %edi,-0x14(%rbp)
   0x00005555555546bb <+11>:    mov    %rsi,-0x20(%rbp)
=> 0x00005555555546bf <+15>:    mov    -0x20(%rbp),%rax
   0x00005555555546c3 <+19>:    add    $0x8,%rax
   0x00005555555546c7 <+23>:    mov    (%rax),%rdx
   0x00005555555546ca <+26>:    lea    -0xa(%rbp),%rax
   0x00005555555546ce <+30>:    mov    %rdx,%rsi
   0x00005555555546d1 <+33>:    mov    %rax,%rdi
   0x00005555555546d4 <+36>:    callq  0x555555554560 <strcpy@plt>
   0x00005555555546d9 <+41>:    mov    $0x0,%eax
   0x00005555555546de <+46>:    leaveq 
   0x00005555555546df <+47>:    retq   
End of assembler dump.
(gdb) info registers rsp
rsp            0x7fffffffde20    0x7fffffffde20
(gdb) x/-20x 0x7fffffffde20
0x7fffffffddd0:    0x00000000    0x00000000    0x00000002    0x00000000
0x7fffffffdde0:    0xffffdf40    0x00007fff    0xffffde60    0x00007fff
0x7fffffffddf0:    0xf7ffe150    0x00007fff    0x00000000    0x00000000
0x7fffffffde00:    0x00000001    0x00000000    0x5555472d    0x00005555
0x7fffffffde10:    0x00000000    0x00000000    0x00000000    0x00000000
(gdb) step
__strcpy_ssse3 () at ../sysdeps/x86_64/multiarch/strcpy-ssse3.S:32
32    ../sysdeps/x86_64/multiarch/strcpy-ssse3.S: No such file or directory.
(gdb) x/-20x 0x7fffffffde20
0x7fffffffddd0:    0x00000000    0x00000000    0x00000002    0x00000000
0x7fffffffdde0:    0xffffdf40    0x00007fff    0xffffde60    0x00007fff
0x7fffffffddf0:    0xf7ffe150    0x00007fff    0x00000000    0x00000000
0x7fffffffde00:    0x00000001    0x00000000    0x5555472d    0x00005555
0x7fffffffde10:    0x00000000    0x00000000    0x555546d9    0x00005555
(gdb) 




The last line starts at 0x7fffffffde10 and ends with 0x7fffffffde1F (one address less than rsp). Why I don't see ascii code of 'a' 10 times? Any idea?




Regards,
Mahmood