[Buildroot] where is 'ldd'?
narkewoody at gmail.com
Tue Jul 9 01:05:58 UTC 2013
On Mon, Jul 08, 2013 at 06:49:40PM +0200, Thomas De Schampheleire wrote:
> On Mon, Jul 8, 2013 at 4:27 PM, Woody Wu <narkewoody at gmail.com> wrote:
> > On Mon, Jul 08, 2013 at 04:14:37PM +0200, Zoltan Gyarmati wrote:
> >> On 07/08/2013 03:56 PM, Woody Wu wrote:
> >> > Hi,
> >> >
> >> > I just cann't find what is the menu item in buildroot to enable building
> >> > of 'ldd' for my target. Does anyone know it?
> >> >
> >> > Thanks in advance.
> >> >
> >> Sure you don't have it already on your system? What toolchain / libc
> >> are you using?
> > I also feel strange, but its sure. I am using Code Sorucery, downloaded
> > it's lite version (arm linux eabi version, 2013-05-24). It comes with an
> > installer, which created a seperated directory in my home. I searched
> > through its installation directory (via 'find'), sure not have anything
> > like "*ldd".
> You really don't need a special ldd.
> ldd is just a script. In its most basic usage (ldd <executable>), it just runs:
> # LD_TRACE_LOADED_OBJECTS=1 <executable>
> For example on busybox:
> # LD_TRACE_LOADED_OBJECTS=1 /bin/busybox
> linux-vdso32.so.1 => (0x00100000)
> libc.so.6 => /lib/libc.so.6 (0x0fe70000)
> /lib/ld.so.1 (0x48000000
> So for sporadic usage, an ldd script isn't even needed.
> See 'man ld.so' for information on this LD_TRACE_LOADED_OBJECTS
> variable (and several other useful variables that change the behavior
> of the executable.
> See also: http://www.catonmat.net/blog/ldd-arbitrary-code-execution/
Cool! learned a thing!
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