CODEWITHSUNDEEP
cgccgdblibcstrcpy
user10199821
user10199821

Reputation:

../sysdeps/i386/i686/multiarch/strcpy.c: No such file or directory

I'm trying to debug a program with gdb and when I set a breakpoint and continue on the strcpy() function. I get the following response:

frinto@kali:~/Documents/theclang/programs/helloworld$ gcc -fno-builtin -m32 -g -o char_array char_array.c 
frinto@kali:~/Documents/theclang/programs/helloworld$ ls
a.out  char_array  char_array.c  firstprog.c  helloworld.c
frinto@kali:~/Documents/theclang/programs/helloworld$ ./char_array 
Hello, world!
frinto@kali:~/Documents/theclang/programs/helloworld$ gdb -q char_array
Reading symbols from char_array...done.
(gdb) list
1   #include <stdio.h>
2   #include <string.h>
3   
4       int main() {
5           char str_a[20];
6   
7           strcpy(str_a, "Hello, world!\n");
8           printf(str_a);
9       }
(gdb) break 6
Breakpoint 1 at 0x11c6: file char_array.c, line 6.
(gdb) break strcpy
Breakpoint 2 at 0x1040
(gdb) break 8
Breakpoint 3 at 0x11dc: file char_array.c, line 8.
(gdb) run
Starting program: /home/frinto/Documents/theclang/programs/helloworld/char_array 

Breakpoint 1, main () at char_array.c:7
7           strcpy(str_a, "Hello, world!\n");
(gdb) cont
Continuing.

Breakpoint 2, strcpy_ifunc () at ../sysdeps/i386/i686/multiarch/strcpy.c:29
29  ../sysdeps/i386/i686/multiarch/strcpy.c: No such file or directory.
(gdb)

I'm on Kali 2.0 and I've installed: libc6-dbg and libc6-dbg:i386

If it isn't obvious already, I want to get rid of this error message:

../sysdeps/i386/i686/multiarch/strcpy.c: No such file or directory

Thanks in advance for any help!

Upvotes: 2

Views: 1557

Answers (1)

Employed Russian
Employed Russian

Reputation: 213829

I want to get rid of this error message:

This isn't an error. GDB is telling you that you've stopped in strcpy_ifunc function (see this description of what IFUNCs are), which is defined in ../sysdeps/i386/i686/multiarch/strcpy.c source file, and that GDB doesn't know how to find that file on the filesystem (and thus can't show you the source of strcpy_ifunc).

The best way to fix this is to tell GDB where to find this source. See (gdb) help directory.

Of course for this to work, you actually need the GLIBC sources. I don't know whether Kali packages sources into libc6-dbg:i386 or not, you may have to install a separate glibc-source package.

Upvotes: 1

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