On 12/14/05, Dave Jones davej@redhat.com wrote:

On Wed, Dec 14, 2005 at 12:35:01PM -0500, Gavin Li wrote:

...

When I do ldd a.out, it depends linux-gate.so.1, what is it? I can't find it in my whole system.

It's the vdso where vsyscalls live. The kernel provides it.

            Dave

I have seen everywhere on internet linux-gate.so.1 => (0xffffe000)

but why is my linux-gate.so.1 => (0x00732000)

?

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On Thu, 28 Dec 2006 19:14:39 +0100 "Chitlesh GOORAH" chitlesh@fedoraproject.org wrote:

I have seen everywhere on internet linux-gate.so.1 => (0xffffe000)

but why is my linux-gate.so.1 => (0x00732000)

Beacuse you have a new and improved kernel that randomizes the address space to give the folks who implemented the address space randomizer a false sense of security about preventing buffer overrun exploits while making it impossible to actually debug any real buffer overrun problems by making it impossible to ever reproduce the same program behavior :-).

(Meanwhile a completely different group of fanatics are spending all their time trying to make programs load 1 nanosecond faster by having the system spend hours pre-relocating libraries so they will load faster at a particular address they will never actually load at because the kernel randomizes the load addresses of everything. Too bad these folks never talk to each other :-).

If you run some more program and check their /proc/pid/maps file, you'll find linux-gate.so.1 in lots of different places.