Seeing results of objdump -D /bin/bash I found something weird.
dynamically linked function name does not appered!
Below is part of <.text> section.
See 672c : call 26e0.
...
672c: e8 af bf ff ff call 26e0 <main@@Base-0xcdc0> # <--- Here
6731: 83 c4 10 add $0x10,%esp
...
I was curious about the called address, 26e0
And found that it points to the <.plt.got> section. See below.
000026e0 <.plt.got>:
26e0: ff a3 0c 00 00 00 jmp *0xc(%ebx)
26e6: 66 90 xchg %ax,%ax
26e8: ff a3 10 00 00 00 jmp *0x10(%ebx)
...
So 672c in <.text> section calls plt section.
But, generally, objdump should show the plt call as a format of <***@plt>
For example,
// gcc -o sample sample.c -fpic -pie
#include <stdio.h>
void main(){
printf("go");
}
See Below, address 615
000005f0 <main>:
...
613: 89 c3 mov %eax,%ebx
615: e8 36 fe ff ff call 450 <printf@plt> # <--- here
...
My question is :
Why "dynamically linked function name" isn't shown in certain binaries such as /bin/dash?
